Iron Tsuba with mushroom motif, signed - Edo

Domed marugata tsuba with mushroom-patterned maru mimi in sukashi.
Very nice patina, but surface wear.
Tsuba signed (in the process of deciphering).
Edo late 18th c.
Sold with wooden box (available from mid-February - the tsuba may be shipped earlier).
Diam. 8 cm.