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.
Small iron tsuba (tantō size) of aoi form with the design of paulownia leaves and blossoms in copper and brass flat inlay (hira-zōgan). Brass sekigane. Open kozuka hitsu-ana.
Early Edo period, 17th century.
Size: 53.4 x 40.7 x 4.4 mm; weight: 47.4 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.
Thin iron tsuba of round form pierced with six three-leaf wood sorrels (katabami) in ko-sukashi and inlaid with brass decoration along the rim. Kozuka-hitsu-ana probably cut at a later date.
Late Muromachi or Momoyama period, 16th century. Dimensions: 78.0 x 77.7 x 2.5 mm.
English translation of the book indicated above Nihon Tō Kōza, Volume VI, Part 1 by Harry Afu Watson, AFU Research Enterprises, Inc., 1993. Tsuba in question illustrated on page 14 and described as follows: " Tsuba mumei Ōnin. Tetsu ji maru gata ko-sukashi tsuchime shitate shinchū suemon ten zogan maru mimi. Brass suemon". My question remains: why such a text is called 'translation' while it looks more like transliteration of romanization? 
NBTHK certification of 1968: "Kicho". Condition is relatively poor: rust, missing inlay, scratches.
While representation of the snowflake is rather standard, the meaning of the other cut-out design was initially less clear. Similar symbol was found at (1) "Kokusai Tosogu Kai, International Convention & Exhibition, September 24-25, 2005, The Frazier Historical Arms Museum, Louisville, Kentucky, USA"; on page 21 there is a photograph J-6 of a ko-tosho tsuba with "iris theme openwork"; (2) Japanese Swords and Tsuba from the Professor A. Z. Freeman and the Phyllis Sharpe Memorial collections. Sotheby's, London, Thursday 10 April 1997; page 11, lot 6 - a ko-katchushi tsuba of early Muromachi period fith "simple design of stylized iris". In both sources the symbol is explained as 'iris" (kakitsubata).
Freeman and Sharpe collections. Sotheby's, 1997.
Kokusai Tosogu Kai, September 24-25, 2005.
Size: 71.4 x 70.2 x 5.2 mm.
An association with the Star of David is doubtful if not impossible.
Thin iron plate of round form and black color carved in sukidashi-bori with design of rocks, waves, clouds, temple gates (torii), mountain pavilion and 5-storey pagoda on both sides, alluding to Todai-ji temple in Nara. Hitsu-ana pierced later. Very narrow very slightly raised rim. Copper sekigane.
Late Muromachi period, 16th century. Dimensions: 88.7 x 88.0 x 2.4 mm (seppa-dai), 1.8 mm (base plate).Reference: “Art of the Samurai” on page 232, №140: ”Kamakura tsuba with Sangatsu-do tower and bridge. Muromachi period, 16th century. 83 mm x 80 mm. Unsigned. Tokyo National Museum. The mountain pavilion and bridge carved in sunken relief on the iron tsuba – both part of Tōdai-ji, a temple in Nara – are detailed in fine kebori (line) engraving. As a result of the chiseling used to create the relief, the ground of the piece is relatively thin".
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.
The same interpretation of the said heart-like symbol (aoi leaf) is given at Helen C. Gunsaulus. Japanese sword-mounts in the collection of Field Museum. // Publication 216, Anthropological Series, Volume XVI; Chicago, 1923; p. 54: "This mokkō-formed tsuba recalls the aoi form, perforated as it is with the four aoi leaves." It is possible that the "wild boar's eye" theory was developed by later scholars.
There is also a theory, supported by Graham Gemmell, saying that: “In simple terms Onin works are decorated Ko-Katchushi tsuba. … But, not content with iron alone, they began to decorate it with what was, in the early Muromachi period, a rare and valuable metal, brass. The Onin workers cut the design into the iron, using narrow channels, cast the brass, piece by piece, and then hammered it into the iron plate as though they were putting together a jigsaw. When complete the tsuba would be black lacquered exactly as the plain iron ones had been, the brass shining dully through it in a way that fulfilled the goal of shibui or restrained elegance.” [Tosogu. Treasure of the samurai. Fine Japanese Sword Fittings from The Muromachi to The Meiji Period, by Graham Gemmell. // Sarzi-Amadè Limited, London, 1991. An exhibition held in London from 21st March to 4th April, 1991]. The following illustration from Helen C. Gunsaulus. Japanese sword-mounts in the collection of Field Museum. // Publication 216, Anthropological Series, Volume XVI; Chicago, 1923; pp. 43 supports the idea.
Helen C. Gunsaulus' description of the dragonfly emblem is as follows: "This motive, the dragon-fly (akitsu), is generally accepted as a symbol of the kingdom of Japan, and the origin of the idea is traced to the legend recounted in the Kojiki and Nihongo of the Emperor Jimmu's view of the island from mountain top. He is said to have thought the kingdom looked like a dragon-fly touching its tail with its mouth. From this it received its name Akitsu-shima... etc."
Haynes Catalog #6, lot 30.
Haynes Catalog #9, lot 143.
Caldwell Collection, #13.
Small iron tsuba (tantō size) of oval form carved with imitation of six overlapping plates, decorated with paulownia blossoms, leaves, and tendrils in brass and copper hira-zōgan. Copper sekigane. Open kozuka hitsu-ana.
Early Edo period, 17th century.
Size: 50.5 x 34.0 x 4.9 mm.
