Japan 1 Silver Bu c. 1846-1867 EF

Obverse
Incuse stamp 定 (= Jo) over 4 kanji in rectangle surrounded by 20 sakuras (cherry blosoms) one of them inverted.

Bottom left 2 strokes of 是 cross.

Reverse
3 vertical kanji in rectangle surrounded by 20 sakuras (cherry blosoms) one of them inverted