This is an antique Japanese military sake cup, decorated with a pair of flags and a star. One of the flags is the flag of Manchukuo, but in a rarer design where the top half is the four color bars instead of it being in the top left quadrant and is used as the naval ensign of the Manchukuo Navy. The words are "Discharge commemoration". There was probably a name under the flags but it's not legible. The exterior of the cup is in a helmet shape with two shells as its base. The surface is a matte finish.

Condition: Mint aside from the name

Size: 2" across