A brass ring dial, with calendar scale on the outer surface, pin hole sight, internal hour scale, 18th Century - 1½in.diam | Christie's

拍品 170

170

A brass ring dial, with calendar scale on the outer surface, pin hole sight, internal hour scale, 18th Century - 1½in.diam

细节

A brass ring dial, with calendar scale on the outer surface, pin hole sight, internal hour scale, 18th Century - 1½in.diam