Three-ring universal equinoctial ring dial for latitudes 18°-62° North. Standard dial (see related terms) except for the following details:-

The suspension ring is missing. Attached to the meridian ring is a strip of brass with holes in it, set between 18° and 62°, with a hole corresponding to every 1°. It appears that the suspension ring would have been set into one of these holes to adjust the dial to the correct latitude. The reverse side has various cities and countries marked against the corresponding latitude hole, mostly in Europe, but also including 'HISP [Dominican Republic and Haiti, formerly Hispaniola] 20'. The obverse side of the equinoctial ring has a date scale and the reverse has an hour scale. The outer rim of the declination ring also displays a scale while the inner rim has a zodiac scale. The equinoxes are marked at approximately 20 March and 20 September. A central groove with a slit in the vicinity of the two scales indicates that there would once have been a sliding collar with a pinhole gnomon here.

This instrument is very unusual in having an additional strip attached to the meridian ring with holes for the latitudes. Like AST0271, it would originally have had a collar inside the declination ring, with the pinholes set into a square on the collar. Another unusual feature is the inclusion of the explanations of the Poles. The quality of engraving is not high and the dial may well have been made by an amateur.

For more information regarding this dial please refer to the OUP & NMM catalogue, 'Sundials at Greenwich'.