A rare James II silver arm badge

A rare James II silver arm badge, possibly for a night watchman or constable,

unmarked circa 1688,

circular form, embossed with a representation of the seal of Scarborough, divided vertically in two, a tower on the left, a lymphad on the right, inscribed 'Ville de Scarburgte (sic)1688', the reverse with two ring attachments, diameter 8.5oz, approx. weight 1.3oz.

Provenance: The James Walker Collection, Christie's South Kensington, 13th July 2006, lot 244.