This is a delightful Martial Redon Limoges oyster plate. It is in fabulous condition, with no chips, cracks, repairs, hairlines, etc.

This oyster plate measures 8 1/4 inches in diameter.

Its mark was used from 1891 until 1896.

A very similar one can be seen on page 78 of Collecting Oyster Plates by Jeffrey Snyder.

This would make a fine addition to any oyster plate collection!