Menuki: Wasps
Signature/mei: mumei
School: Shonai
Material: copper, gold, shakukdo
Era/jidai: Edo period
Dimensions: (left): 17.9mm x 18.8mm x 3.6/6.44mm
Dimensions (right): 25.0mm x 15.6mm x 3.5/5.4mm
Kiri box
Price: €888 / $980 / ¥150000
These menuki with the design of wasps are made of copper. The wings are covered in gold, while the wasp’s stripes are carefully inlaid with shakudo. A typical work of the Shonai school of swords fitting artists.
Currently, there is no attribution by the NBTHK, but I guarantee at least for hozon.