Imitation compass dial for latitude 50° North. Circular horizontal dial with a fake lathe-turned plastic box, with lid. It has an hour scale numbered in black paint and a shaped and engraved brass gnomon that folds flat when not in use. It is also marked with an 'M'. The compass has a steel needle in the form of an arrow and is surmounted by a shallow conical brass pivot. A glass plate covers all. The case is coloured bottle-green, rectangular in shape and in the form of a book with gold-coloured 'page' edges. It is lined with white satin and black velvet.

This dial is a facsimile of the original instrument rather than a copy, since it is made of plastic, not wood. The original is thought to have been made in Portsmouth. The hour-lines are not drawn accurately in this facsimile, which was made for Mary Rose Trading Ltd.

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