Thin six-lobed iron plate of brownish color is carved on each side with a groove that follows the rim and a concentric grooves around the center of the plate, also carved with six thin scroll lines (mokkō or handles, kan) that follow the shape of the rim. Mokume surface treatment. Hitsu-ana  possibly added at a later date, and kogai-hitsu-ana plugged with gold. Silver sekigane.

Signed: Kunihide [國秀]. Higo school, 1st generation swordsmith.

Mid Edo period, ca. 1800.

Would be possibly attributed to Kamakura-bori school revival of the 19th century.

References: Nihon Tō Kōza, Volume VI / Japanese Sword / Kodōgu Part 1, page 231: Enju Kunihide, a tōshō from Higo: "...forging of the jigane is excellent, and there are also pieces with mokume hada."

Haynes Index Vol. 1, p. 741, H 03569.0: "Enju Kunihide in Higo province, died 1830, student of Suishinshi Masahide. Retainer of the Hosokawa Daimyō, etc."

Additional Information from Markus Sesko:  This tsuba indeed is made by Enju Kunihide, who in his later years signed the HIDE [秀] character as HI [日] and DE [出], as here: Size: 77.4 x 74.9 x 2.7 mm Similar pieces are: 1. In this collection № TSU-0341: Kamakura-bori tsuba with mokkō motif. Muromachi period, 15th - 16th century. 2. Dr. Walter A. Compton Collection, 1992, Christie’s auction, Part II, pp. 14-15, №16: “A kamakurabori type tsuba, Muromachi period, circa 1400. The thin, six-lobed iron plate is carved on each side with a wide groove that follows the shape of the rim, and with six scroll lines and a single thin circular groove. […] The hitsu-ana was added at a later date, circa 1500-1550.  Height 8.3 cm, width 8.6 cm, thickness 2.5 mm. The tsuba was initially intended  to be mounted on a tachi of the battle type in use from Nambokucho to early Muromachi period (1333-1400)”. Sold at $935. 3. And another one in Robert E. Haynes Catalog #9 on page 24-25 under №23: “Typical later Kamakura-bori  style work. This type of plate and carving show the uniform work produced by several schools in the Muromachi </em period. Some had brass inlay and others were just carved as this one is. The hitsu are  later. Ca. 1550. Ht. 8.8 cm, Th. 3.25 mm”. Sold for $175.      

Iron tsuba of almost round form with a brass outlined circular opening (sukashi) in the bottom adorned with the Myriad Treasures [takaramono, 宝物] and winter motifs inlaid in cast brass (suemon-zōgan); hitsu-ana possibly cut later, both plugged with shakudo, nakaga-ana fitted with copper sekigane. According to Merrily Baird^*) (2001), the symbolism of Myriad Treasures “is associated with the Seven Gods of Good Luck, who carry them in a sack”. Among the treasures, which are said to ensure prosperity, long life, and general good fortunes, are (reading clockwise from the top):

1. Sake set [shuki, 酒器], namely flask, ladle, and cups
2. Cloves [choji, 丁子]
3. Purse of inexhaustible reaches [kinchaku, 巾着]
4. Magic mallet [kozuchi, 小槌]
5. Key to the storehouse of the Gods [kagi, 鍵]

Then, Pine, Moon, and Bamboo (see below);

7. Rhombus, or Lozenge (hosho, 方勝), with the second ideograph meaning victory.
8. Sacred (or wish-granting) gem, or jewel [hōju, 宝珠]
9. Hats of invisibility [kakuregasa, 隠れ笠]

The Myriad Treasures is carried by the Seven Gods of Good Luck (a.k.a. the Seven Lucky Gods or Seven Gods of Fortune [shichifukujin, 七福神], who are transported by the Treasure Ship [takarabune, 宝船] during the first three days of the New Year. Pine, Moon, and Bamboo: bamboo [take, 竹] and pinecones [matsukasa, 松笠], or pine [matsu, 松] – two of the Three Friends of Winter [shōchikubai, 松竹梅] – symbolize fidelity, fortitude, steadfastness, perseverance, and resilience. The third ‘friend’  – plum, [ume, 梅] – in this case replaced by the Moon [tsuki, 月] – large (11 mm) circular opening at 6 o’clock; the three small carved dots represent the dewdrops. The other side is decorated with an arabesque (karakusa) of cloves and vines, with carved dots (dewdrops) along the rim. The overall New Year / Winter connotation of the tsuba is clear. The prominence of the Moon conveys purity, coldness (sadness/loneliness), and slenderness – the inherent qualities of a samurai. H: 93 mm x W: 90 mm, thickness 4.2 mm at the centre, slightly tapered towards the rim. *) Merrily Baird. Symbols of Japan: Thematic motifs in art and design. — NY: Rizzoli international publications, 2001. Seller’s description: École Heianjo - Début Époque EDO (1603 - 1868). Nagamaru gata en fer à décor incrusté en hira-zogan de laiton de tama, choji, jarre à saké et des attributs de Daikoku (maillet, chapeau d'invisibilité et sac de richesse) et de branches de choji de l'autre côté et ajourée en kage-sukashi d'un cercle. H. 9,2 cm

Iron tsuba of round form with design of iris and snowflake in openwork (ko-sukashi or small cut-outs) outlined with brass wire. Three concentric rows of brass dots (ten-zōgan), with a brass circular line inside the innermost row of dots (missing on the back). Hitsu-ana is not outlined with brass wire, which let us suppose that it was cut out at a later date. Iron and brass. Ko-sukashi and ten-zōgan technique. Mid Muromachi period (1454-1513). Height: 74.0 mm, Width: 73.6 mm, Thickness: 3.0 mm.

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).