Magnetic dial for latitude 51°. The dial is printed on varnished compass card, on the underside of which is a bar magnet, set on a point, to orient the dial correctly (positioned for a magnetic variation of 15° West of North). Around the edge of the card is a compass ring with 16 points marked, seven by English initials and North by a fleur-de-lys. The hour ring is numbered clockwise IIII-XII, I-VIII, and a winged Father Time is portrayed with a sickle, hourglass and a snake biting its tail, at the South point. A simple brass gnomon sits on the compass card. The domed glass cover is missing. The dial has a turned wooden case with a push-fit lid.

This dial is similar in style to those of Samuel Porter (see AST0421 and AST0242), with the portrayal of Father Time on the dial-plate. It is signed 'Ebsworth, Fleet Street, London'.

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