Iron tsuba of round form pierced (sukashi) and inlaid in flat (hira-zōgan) and cast brass (suemon-zōgan), details carved in kebori, with design of two phoenixes, bamboo, and paulownia leaves and flowers (kiri-mon) on both sides. According to seller: Bizen-Yoshirō school (or Heianjō school). Unsigned.

Momoyama period. End of the 16th - beginning of the 17th century. Dimensions: Diameter: 99.5 mm; Thickness: 2.1 mm at centre; 4.3 mm at the rim. According to Merrily Baird (Symbols of Japan), "bamboo teamed with paulownia blossoms or with paulownia and the phoenix, in reference to the Chinese legend that the phoenix perches only on the paulownia and eats only the bamboo". Citation from http://www.clevelandart.org/art/1986.2.1: "The immense heraldic birds on display [...] reflect the Momoyama era's spirit of newly gained self-confidence and an affinity for grand expressive statements in painting, architecture, the textile and ceramic arts, as well as garden design. While that period preceded the arrival of prosperity, it clearly marked an extraordinary moment in Japanese cultural history, one frequently compared with the twelfth century of the Heian period.  [...] Rather than an emblem of immortality, as it is in Western lore, in Japan, the phoenix evolved out of its origins in Chinese mythology to become, by the sixteenth century, an auspicious symbol of political authority. Together with clusters of the distinctively shaped paulownia leaves, this long-tailed, mythical bird  [...] proclaiming an air of graceful command".  

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 8-lobed form pierced with six openings (sukashi) and decorated with design of bamboo and arabesque in flat brass inlay (hira-zōgan). Two of the openings serve as hitsu-ana. The design on the face represents bamboo trunks and leaves, clouds, waves, and vines; on the back - vines and leaves, that forms an arabesque (karakusa) motif. Rounded square rim. 'Silver' patina. Hitsu-ana with copper sekigane. Heianjō (most probable) or Kaga-Yoshirō school. Late Muromachi or Momoyama period; 16th century. Size: Height: 74.6 mm; Width: 69.5 mm; Thickness at seppa-dai: 4.2 mm. Weight: 113.9 g. Provenance: Gary D. Murtha. This tsuba is illustrated at: Japanese sword guards. Onin - Heianjo - Yoshiro by Gary D. Murtha [GDM Publications, 2016, p. 48]: "Iron, 80x75x3 mm tsuba with brass karakusa vines and leaves on one side with bamboo, leaves, and clouds on the reverse. This tsuba is one of those pieces that might be classified as Onin or Heianjo work, but the flush inlay tips it to the Heianjo side. Late Muromachi period." I would like to add that it easily may also be classified as Kaga-Yoshirō. Robert Haynes in Study Collection.., page 32, illustrates a look-a-like example, and writes: "This style of inlay, where the designs on the face and the back are very different, was common to the work of artists in Kyoto in the Momoyama period."