• Iron tsuba of slightly elongated round form decorated with design of melon flowers, vines, and leaves in brass flat inlay (hira-zōgan) on both sides. Slightly raised rim (mimi) carved in a way to simulate ring-shaped covering (fukurin). Kozuka hitsu-ana and kogai hitsu-ana both plugged with soft metal (tim or lead). Copper sekigane. Heianjō or Kaga School. Muromachi or Momoyama period, 16th century. Iron, hira-zōgan brass inlay. Round (maru gata) form, diameter 79 mm. Size: 80.3 x 78.4 mm; thickness at seppa-dai: 3.4 mm; at the middle: 3.8 mm; before the rim: 2.4 mm, rim: 2.8 mm. Note on design: though this design resembles family crests with oak and mulberry leaves, I believe it's  a melon flower [see Jeanne Allen. Designer's guide to Samurai Patterns. Chronicle Books, San Francisco, 1990, page 114, №130 "Melon Flowers":

    Jeanne Allen. Designer's guide to Samurai Patterns. Chronicle Books, San Francisco, 1990. Page 114, №130.

    Note about the distribution of thickness (niku-oki): "this tsuba has toroid features, niku raises from the rim towards the centre but thins once more out when approaching the seppa-dai" [M. Sesko, "Handbook...", p. 48].
  • Iron tsuba decorated with sparrows and bamboo inlaid and chiseled in yellow brass, with snow lying on bamboo leaves inlaid in silver-ish shibuichi. Copper sekigane. The kogai-hitsu-ana probably cut out at a later date. Heianjō school. Unsigned. Height: 86.0 mm, Width: 85.4 mm, Thickness at seppa-dai: 2.9 mm. Momoyama or early Edo period, first half of the 17th century. Merrily Baird, Symbols..., page 118: "The association of the sparrow (suzume) with both bamboo and rice heads is an old one found in Japanese poetry, paining, and design."
  • Iron tsuba of round form decorated with a design of bracken scrolls and paulownia leaves and blossoms (kiri-mon) in openwork (sukashi). Details carved in kebori. Squared rim with iron bones (tekkotsu). Hitsu-ana plugged with shakudō.

    Size: 83.6 x 82.9 x 5.4 (center), 5.1 (rim) mm.

    Unsigned.

    Muromachi period, ca. 16th century.

  • Large iron tsuba with hammer marks on the surface, small oval opening to the right of nakaga-ana; yamagane fukurin chiselled with tortois shell diaper pattern.

    Early Muromachi period (1393-1453). Size: 101.2 x 101.9 x 2.4 (center), 5.2 (rim) mm; weight: 148.4 g.  
  • Iron tsuba of mokko form decorated with encircled family crests in low relief carving; niku from 3.0 mm in the centre to 4.0 mm at rim and full 1 mm raised uchikaeshi-mimi. Nobuie [信家] signature (hanare-mei) to the left of nakago-ana; on the reverse, to the right of nakago-ana, the inscription reads “62”, which may be how old the master was at the age of making the tsuba. Pewter or lead plugged hitsuana. In a wooden box, in a custom pouch. Size: H: 80 mm, W: 75, Th(c): 3.1 mm, Th(r): 4.0 mm Weight: 103.5 g

    Signed: Nobuie [信家] / 62

    Probably the work of Shodai Nobuie (c. 1580).

    Tokubetsu hozon certificate № 2002993 of the N.B.T.H.K., dated January 15, 2016. NOBUIE TSUBA by Steve Waszak The iron tsuba made by the two early Nobuie masters are regarded as the greatest sword guards ever made across hundreds of years of Japanese history.  Only a small handful of other smiths' names are even mentioned in the same breath as that of Nobuie.  Despite the well-deserved fame of the Nobuie name, virtually nothing is known with certainty about the lives of the two men who made the pieces carrying this name.  They are thought to have been men of Owari Province, with the Nidai Nobuie also spending time in Aki Province at the end of the Momoyama Period. Two Nobuie tsubako are recognized.  The man whom most consider to have been the Shodai signed his sword guards with finer and more elegantly inscribed characters than the smith seen by most as the Nidai.  The term used to describe the mei of the Shodai is "hanare-mei" or "ga-mei," while that used to characterize the signature of the Nidai is "futoji-mei" or "chikara-mei."  These terms refer to the fineness and grace of the Shodai's signature and the relatively more powerfully inscribed characters of the Nidai's.  The Shodai is thought to have lived during the Eiroku and Tensho eras in the latter part of the 16th century, while the Nidai's years are considered to have been from Tensho into the Genna era.  This locates both smiths well within the Golden Age of tsuba artists -- the Momoyama Period. Nobuie tsuba are esteemed and celebrated for the extraordinary beauty of their iron.  The combination of the forging of the metal, the surface treatment by tsuchime and yakite married to powerfully expressive carving, the masterful manipulation of form, mass and shape, and the colour and patina of the iron makes Nobuie sword guards not only unique in the world of tsuba, but the greatest of the great. The sword guard here is a Shodai-made masterwork, done in mokko-gata form, a shape the early Nobuie smiths mastered to a degree unmatched by any others.  The expanding of the mass of the tsuba from the seppa-dai to the mimi, increasing by 50% from the centre of the guard to the rim, creates a sense of exploding energy, which is then contained by the uchikaeshi-mimi, yielding a lightning-in-a-bottle effect of captured energy.  The hammering the master has employed to finish the surface is subtle and sensitive, achieving a resonant profundity, and the deep blue-black colour -- augmented by a lustrous patina -- leaves the tsuba to positively glow in one's hand.  In this piece, Nobuie has used a motif of several kamon, or family crests, each carved only lightly on the surface in a loose ring around the nakago-ana.  Due to the shallow depth of this carving, together with the tsuchime finish of the plate, the effect is to leave the kamon with a sort of weathered appearance, recalling the prime aesthetic values of sabi and wabi, which had great circulation in the Tea Culture so ascendant in the Momoyama years.  However, the effects of sabi and wabi expressed in the treatment described above are amplified and deepened by the color and patina of the iron, thereby adding yet another aesthetic value -- yuugen -- which is linked with the abiding mystery of the universe and one more — mono no aware — which alludes to the pathos of life's experiences and transitory nature.  In short, this Nobuie tsuba joins poetry with power and therein exemplifies the unrivalled brilliance of Nobuie workmanship.
  • Iron tsuba of oval form with design of iris and plank bridge (yatsubashi) in openwork (sukashi). Rounded cornered rim. Unsigned. Attributed to Jingo - 3rd generation Shimizu, 2nd generation Jingo (1691-1777) [M. Sesko, Genealogy..., p. 94]. Edo period: Late 18th century (Hohreki Meiwa era). Height: 69.5 mm. Width: 65.2 mm. Rim thickness: 4.6 mm. Center thickness: 4.8 mm. Provenance: Sasano Masayuki Collection, № 251: "Shimizu. Third generation Jingo (died at 87 years of age in the sixth year of An-ei, 1777). The eight-section bridge with irises are arranged to create the design of 'yatsubashi'. The features are unique for the Shimizu school and show no influence of the Hirita, Nishigaki or Hayashi schools". The design visually resembles a butterfly. As described in Family Crests of Japan by Stone Bridge Press [Family Crests of Japan; Stone Bridge Press, Berkeley, CA, 2007], and also in Japanese Family  Crests by Yuzuru Okada [Yuzuru Okada. Japanese Family Crests // Series: Tourist Library: 37. Board of tourist industry; Japanese Government Railways, - 1941], there is a special technique used in construction of family crests, called 'reshaping' by the former and 'reconstruction' by the latter: "reconstruction is realized when a motive has its general shape composed of the detail of entirely different motive as, for instance, the crest of a butterfly formed of pine-needles. [...] The fanciful and ingenious forms evolved in this way may be represented by the kasiwa-giri or 'oak-leaf-paulownia', the ogi-bisi or 'fan-lozenge', the matuba-zuru or 'pine-needle-crane', the omodaka-kotyo or 'water-plantain-butterfly', etc." In our case we can call the motif yatsubashi-chocho or 'Iris-and-Bridge—Butterfly'.  
  • Iron tsuba of round form with design of rabbit (usagi) in openwork (sukashi) and inlaid with designs of plants and family crests (mon) in suemon-zōgan. A branch with lonely leaf, half chrysanthemum, and flying wild geese on the face represent autumnal connotations. The same motif is complemented by a clove (choji) on the reverse.  The family crests (mon) include: interlocked rings (kanawa; wachigai), three encircled lines or stripes (hikiryo), bit or muzzle (kutsuwa - horse's harness element with possible christian symbolism), and encircled triangle (uroko, fish scale). Brass wire trim around the openwork elements and the seppa-dai, scalloped wire inlay around the hitsu-ana. Iron is dark, almost black. Brass or copper elements vary in shades of lighter and darker yellow with red-ish hue. Ōnin school. Late Muromachi period, 16th century. Height: 89.6 mm; Width: 89.3 mm; Thickness at seppa-dai: 3.0 mm. Weight: 129.7 g.
  • Iron tsuba of circular form with the knotted geese (kari) flying over the rough waves pierced (sukashi) and carved in low relief (nikubori). Hitsu-ana plugged with soft metal. Hitsu-ana plugged with soft metal (tin or lead).

    Signed: Echizen koku jū Myochin Katsuharu saku.

    Edo period.

    Size: Height: 80.7 mm; Width: 81.0 mm; Thickness: 4.5 mm; Weight: 110 g.

    Two tsuba of this master can be found at Georg Oeder Collection (Japanische Stichblätter und Schwertzieraten. Sammlung Georg Oeder Düsseldorf. Beschreibendes Verzeichnis von P. Vautier. Herausgegeben von Otto Kümmel.Oesterheld & Co / Verlag / Berlin, Oesterheld, 1915; LIB-1465 in this collection) under №№ 172 and 173, page 21, though no illustrations. SOLD.
  • Iron tsuba of round form decorated with design of sea waves in low relief carving (kebori) and pierced with design of cherry blossom in negative silhouette (in-sukashi) and water wheel in positive silhouette (ji-sukashi). The solid portion of the plate has a shallow groove just before the edge. Copper sekigane. School attribution is unclear. Unsigned. Momoyama period, 16th - 17th century. Dimensions: Height: 70.3 mm, width: 71.1 mm, thickness at seppa-dai: 4.4 mm, at rim 4.1 mm. Provenance: Robert E. Haynes, Mark Weisman. This is what shibuiswords.com says about this tsuba:
    "A very unusual iron plate tsuba. The solid plate is carved with waves on both sides. A cherry bloom in sukashi, lower left, and the right third of the plate in openwork with design of a water wheel. The rim with some iron bones. The hitsu-ana is original but the shape may have been slightly changed. One would expect this to be the work of the early Edo period, but the age of the walls of the sukashi would suggest that this is a work of the middle Muromachi period. This must be the forerunner for the Edo examples we see of this type of design." (Haynes)
    I managed to find a look-a-like tsuba in Haynes Catalog #5, 1983, pp. 20-21, №44: "Typical later Heianjo brass inlay example. Ca. 1725. Ht. 7 cm., Th. 4.5 mm., $100/200".

    Haynes Catalog #5, 1983, pp. 20-21, №44.

    We see that the  plate design of both tsuba is the same, and the only difference is the trim. It would be logical to assume that both pieces were made at about the same time, rather than 225 years apart. To be fair, let's accept that they were made in Momoyama period.
  • Iron tsuba in a form of an eight-petalled blossom (lotus) form, petals separated by linear low-relief carving, both hitsu-ana filled with gold plugs, the surface decorated with tsuchime-ji, rich grey-brownish patina, niku from 4 mm in the centre to 6 mm at the rim. Strong (futoji-mei) Nobuie [信家] signature to the left of nakago-ana. Attributed to the 2nd generation of Nobuie masters (Nidai Nobuie).

    Size: outer diameter  84 mm, thickness at centre: 4 mm, at rim: 6 mm. Wight: 167 g.

    Signed: Nobuie [信家]

    Probably the work of Nidai Nobuie (c. 1600).

    The gold plugs are likely a later work.
  • Iron tsuba of round form with slanting rays of light (shakoh) Christian motif (Jesuit’s IHS symbol) in openwork (sukashi). Traditional description of this kind of design is called “tokei”, or “clock gear”. Signed: On the face: Bushu ju Akasaka; On the back: Tadatoki Saku [Made by Tadatoki, resident of Bushu]. Probably, 4th generation of Akasaka School master Tadatoki (忠時), who died in 1746. Akasaka School. Edo period, first half of the 18th century. Size: 79.8 x 78.5 x 6.5 mm
  • Iron tsuba of half round and half lobed (chrysanthemoid) form decorated with plants and family crests (mon) in cast brass inlay (suemon-zōgan), and scattered brass dots inlay (ten-zōgan); brass wire inlay outlining the rim, seppa-dai, and hitsu-ana (scalloped wire) on both sides. Surface treated with hummer punch marks. The chrysanthemoid half of the plate chiseled  with thin shallow grooves, outlining the petals. Copper sekigane. On the face the inlay represents: mandarin orange (tachibana), half karahana, encircled bellflower, and four encircled three-stipe family crest (mitsubiki-mon of Sakuma and Abe clans, and some others). On the reverse the design is similar but two of the mitsubiki-mon symbols replaced with two comb-shaped Genji-mon ideographs. Ōnin school. The end of mid-Muromachi period, beginning of the 16th century. Size: 74.3 x 72.7 x 2.4 mm.  
  • Iron tsuba of round form with two overlapping triangles (uroko) motif  in openwork (sukashi). Triangle patterns usually associate with 'fish scale', mon of Hojo family (and others). Edo period or later.

    Size: 71.4 x 70.2 x 5.2 mm.

    An association with the Star of David is doubtful if not impossible.  
  • Iron tsuba of mokkō form (mokkōgata) pierced (sukashi) and inlaid with precast dark brass inlay (taka-zōgan) with somewhat abstract/geometrical design that can be liberally described as pines, mist, and snow.

    Momoyama or early Edo period. End of the 16th - beginning of the 17th century. Heianjō school. Unsigned. Dimensions: 86.8 x 82.9 x 4.5 mm.
  • Small iron tsuba for a dagger (tantō), of quatrefoil form (mokkō-gata), with raised rim (mimi), decorated with flat brass inlay (hira-zōgan) to form an abstract design alluding to the mushroom of immortality (reishi). Opening (hitsu-ana) to the left of nakaga-ana probably cut later and fitted with shakudo sekigane. Maker's signature on seppa-dai: Koike Naomasa (小池 直正).

    Momoyama period: End of the 16th - beginning of the 17th century. Dimensions: Height 53.7 mm; Width: 45.5 mm; Thickness at centre: 3.5 mm; at rim: 4.9 mm. Other examples of signed Koike Naomasa work in this collection: TSU-0346. Reference: The closest example in literature is in Compton Collection (II): №11 with the description: “A Koike School tsuba, Edo period (circa 1625), signed Koike Yoshiro. Sheet-brass flush inlay of cloud forms and wire inlay creating the same shape. Koike Yoshiro Naomasa worked from the Keicho to the Genna periods (1596-1623). He arrived in Kyoto from Kaga.” [Japanese Swords and Sword Fittings from the Collection of Dr. Walter Ames Compton (Part II) / Sebastian Izzard, Yoshinori Munemura. — Christie's, New York, October 22, 1992]. See: Yoshirō tsuba.    
  • Iron tsuba of round form decorated with eight roundels – circular emblems of flowers and/or family crests (mon) made of cast brass, pierced and chiseled in kebori, and with flat brass inlay (hira-zōgan) of vines or leaves all over the plate. Both hitsu-ana trimmed in brass. Nakago-ana of rectangular form, with copper sekigane. Four positive openwork (ji-sukashi) roundels at 12, 3, 6, and 9 o'clock; and four negative openwork (in-sukashi) roundels with cherry blossom, bellflower, and two variations on suhama theme. Yoshirō school (Kaga-Yoshirō). The Momoyama or early Edo period, late 16th to early 17th century. Size: diameter 81.4 mm, thickness 4.7 mmat seppa-dai, 4.0 mm at rim. Christie's lot description: AN IRON TSUBA; EDO PERIOD (17TH CENTURY). THE DOLPHYN COLLECTION OF SAMURAI ART. The round iron tsuba pierced with roundels of various floral motifs interspersed among scrolling foliage, all inlaid with brass. 8.1 cm. high. Provenance: Pabst Collection (no. 338).
  • Iron tsuba with design of a cricket and grass inlaid in brass (suemon-zōgan) and a bridge over a stream in openwork (sukashi) on both sides. Inlay of distant part of the cricket's antenna is missing. Heianjō School. Momoyama period. Diameter: 79.5 mm, thickness at seppa-dai: 3.3 mm NBTHK # 4002100.
  • Iron tsuba with hammer marked surface and design of a plum and cherry blossoms to the right of nakaga-ana in openwork (sukashi). Raised rim, typical to katchushi school. The thickness of the plate provides for later Muromachi period making.

    Late Muromachi period (1514-1573). Size: 85.8 x 85.0 x 3.6 (center), 4.1 (rim) mm; weight: 136 g.