Here is a Vintage BIRKS Canada Regency Plate Silver Plated Bell Dome Single Slit Ring Box for sale

This bell shape cylindrical ring box measures 50mm wide at the base, and 43mm tall.

The hinge at the cap is in good working shape, snaps open and closed , free of any dents 

Has been polished, but still has some light tarnishing at some spots.

Please refer photos above for details.