Fuchi Kashira with matching crabs and seashells set.
Alloy: Shakudo (mixture of copper 3% to 6% gold)
Signed: Kashu ju Katsuki Ujiyoshi
Fine Nanako background
Edo period: 1603-1868
Size: 3.8 cm X 2 cm (Fuchi),  3.4 cm X 1.8 cm
Note: Fuchi Kashira are one of the components of a mounted Japanese sword.