Diptych dial for latitude 40°-55° North. Rectangular wooden dial faced with paper, consisting of two leaves that fold flat when not in use. Leaf Ia contains a table of latitudes in two columns, listing towns in Europe. The table is surrounded by a decorative border with a wheatsheaf pattern, with another border at the bottom of the table. The leaf is discoloured with age. Leaf Ib has an oval vertical dial, designed for use at 50° North. There is a latitude scale for the adjustment of the string gnomon, bordered by a garland, with a flower on the meridian line. Floral motifs, painted orange and green, adorn the spandrels.

Leaf IIa features a compass with three concentric hour scales for a horizontal dial set around it. A string gnomon, adjustable for latitudes 38°-54° North, is attached between the inner surfaces of the two leaves. The compass is marked with eight points, named in German, and the magnetic variation is marked at 20° West of North. The needle has an arrow for North and is surmounted by a brass pyramidal pivot. The glass plate is held in place by a metal ring. Leaf IIb is blank. The leaves have a brass hook fastener and a brass hook to hold the leaves open. This dial is very similar in style to AST0150, made by David Beringer, and may have originated from the same workshop.

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