Shakudo nanako fuchikashira signed Yanagawa Naomitsu. This is a fake signature (gimei), however item is a great quality piece from late edo period.
Size:
Fuchi: 38 mm x 23 mm x 14 mm
Kashira: 34 mm x 18 mm x 10 mm
In custom made kiri box, however kashira no longer fits perfectly. There is wood under silk and most probably it shrank slightly because of changes in humidity.
