Strobe effect frame on copper 17cm x 21cm

Rare. Strobe frame. Scene in a fishing port. The brightness of the areas varies according to your position. A priori it seems to be an engraving on a thin film of copper or brass. Dimensions 17cm X 21cm. Good condition even if the frame is dated - repaint it. The glass is intact. It is a beautiful object.

Ref. : 716X8XXC