AF25390 Menuki: Mumei(Unsigned)

Menuki:

Signature: Mumei(Unsigned)

Dimension 1: 6.5cm x 1.0cm (2.56in x 0.39in)
Dimension 2: 6.6cm x 1.3cm (2.60in x 0.51in)

Era: unknown

Features: One side depicts a military flag and a command fan, while the other appears to show a musical instrument.

Aoi Art estimation paper
In Kiri box