Mei (signature) : mumei(Unsigned)
Length 1 : 3.64cm x 1.16cm ( 1.43inches x 0.46inches)
Length 2 : 3.57cm x 1.13cm ( 1.4inches x 0.44inches)
Jidai(era) :Edo Period
Special feature:On Shakudo Nanakoji plate, dragonfly is engraved and inlaid with gold.
Therefore this dragonfly design is very popular by Samurai because it was a symbol of victory.
Aoi estimation paper
In Kiri box.