This is a lovely vintage pair of mid-century Mikimoto Japanese akoya saltwater cultured pearl cufflinks.

The pearls are 5.00mm round. They have great luster with bright rosy overtones. 

They are made of solid sterling silver and are marked "S" in a square which is an older mark for sterling and "M" in a clamshell for Mikimoto. The entire piece is done in a gold wash. Japan 1940's-1980's. 

All pearls are truly vintage and have only been lightly cleaned. Could use a polish, some plating loss and patina.