Novelty miniature grand piano by Prince. Made in occupied Japan.
Made from white plastic with chrome lid and legs. A decorative pattern is engraved on the lid and sheet music stand. 
The keys have a lot of wear and the lid doesn’t stay closed. The front left leg has old damage/repair.
It comes in it’s original box which has lots of wear, tears and old tape. Please see photos for more details. 
Dimensions:
Width: 70mm (2 3/4”)
Depth: 80mm (3 1/6”)
Height: 55mm (2 1/6”)
Boxed weight: 180g