Universal equinoctial scaphe dial for all latitudes. The bowl of the dial is set within a horizontal ring supported by two vertical orthogonal semicircular latitude arcs, which are set into the base. The bowl is cut away at 30° below the horizontal. A small circular ring within the bowl has a conical gnomon attached at the top and supports a compass, which is set in gimbals. The whole of the dial apparatus is free to rotate within the horizontal ring and the latitude arcs.

The main horizontal ring has two degree circles and a wind-ring on which 16 winds are named in Italian. The latitude arcs each carry a degree scale. There are degree scales and a zodiac circle on the dial bowl. Parallels of solar declination are marked on the inner side. Hour-lines are also marked out and below these is a rotatable ring carrying scales for lunar age and Italian/Babylonian hours. There are two butterfly screws at opposite sides of the dial bowl to lock the bowl against the latitude scale. On the compass, an engraved arrow marks the magnetic variation at 5° East of North.

This is an unusually elaborate equinoctial dial, clearly made for a very wealthy customer. The combination of equinoctial dial and scaphe dial is relatively uncommon but also appears on AST0213. The use of the Italian wind names and the inclusion of a rotating ring for converting common hours into Italian or Babylonian hours suggest that this dial was made for an Italian patron, but the origin of the dial itself is unclear.

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