Eimer 1364, BHM 2051.
Silver. 46mm. By B.Wyon.
Obverse with bust of Frederick William IV of Prussia. Reverse with crowned shield of Prussia between those of Britain and Saxe-Coburg-Gotha.
Frosted and set within watch style glass. Mint state and particularly attractive. Housed in original fitted case of issue, which has some damage to the hinge. Rare.