A Victorian silvergilt 'castletop' vinaigrette

A Victorian silvergilt 'castletop' vinaigrette, oblong, with raised floral borders, an engine-turned base and sides, cover depicting a relief view, perhaps of Balmoral Castle, makers mark overstruck, perhaps 'J W' of 'G W', Birmingham c.1835 (date letter partially struck) 1.75in (4.5cm) long.