Pair of mismatched napkin rings in silver metal

Pretty duo mismatched with rings to slip your napkin into. Both have slightly varying sizes, and different qualities and origins.

Hallmark M Clover B on the one with the many central streaks and a Silver Metal hallmark for the other. There is no other indication upon the supposed silver quality.

Approximate dimensions of the circles: diameter of 4.5 cm and height of 2.5 cm.

Note, traces of oxidation and lacks due to their past use as shown in the last photos.