Iron tsuba pierced and carved (marubori-sukashi) with the 'horse in the round' design. Possibly, Bushū-Ito school, 19th century (ca. 1800). Kogai-hitsu-ana plugged with shakudō.

Size: 67.6 x 66.8 x 5.1 mm

Unsigned.

See:

1. 1. Robert E. Haynes. Study Collection of Japanese Sword Fittings. Nihon Art Publishers, 2010, p. 120: Iron plate carved and formed in the round as a tethered bull...Signed: Bushū jū Sadayasu saku.
   2. Robert E. Haynes. Masterpiece and highly important tsuba, etc... San Francisco, 1984 // Catalog #9.: Signed: Bushū jū Yoshifusa. Ca. 1800, H 6.7 cm, Th. 4.75 mm.
   3. The Hartman collection of Japanese metalwork. Christie's, 1976, p. 29, №59: Bushū type, 19th century. Reference to Takezawa, Nihon Toban Zuetsu №411 for a similar design signed Bushū Yoshifusa.

4. Japanese Sword Fittings from the R. B. Caldwell Collection. Sale LN4188 "HIGO". Sotheby's, 30th March 1994, p. 17, №24: An iron tsuba, by Heianjo Sadatsune, Edo period (18th century). In the form of a horse, standing with its head lowered and a rope halter attached to its bit and trailing beneath. Signed Heianjo Sadatsune, 7.3 cm. With NBTHK Tokubetsu kicho paper, dated Showa 49 (1974). GBP 600-700.