An 18th Century brass universal equinoctial ring dial, unsigned, but engraved on one side of the equinoctial ring ROBT. FLETCHER, on the other side EX DONO SHAN DIVI JOHANN COLL. CANTAB. MDCCLV, the bridge with sliding pin-hole sight and engraved with calendar and declination scales - 4½in(11.4cm)diam