Augsburg dial for latitudes 10°-90° North. Standard dial (see related terms) except for the following details:-

The dial-plate is gilt-brass with a silvered compass. An engraved arrow in the compass indicates the magnetic variation at 10° West of North. Engraved around the compass on the plate are the signature and three towns with their latitudes: 'Wien [Vienna] 48', 'Londen 52' and 'Augspurg 48.' The silver latitude arc is divided [10°]-90° and the silver hour-circle segment is numbered 3-12, 1-9. The outer rim is engraved with a pointing hand to mark the latitude on the latitude arc. The gnomon support and gnomon are made of gilt-brass and the dial-plate is supported by three silver legs. On the base of the compass, a table of latitudes lists towns and cities in Europe.

Unusually for Martin, the hour ring on this dial simply consists of a thick band of silver without the surrounding brass ring. Otherwise it is typical of his style of working. On the obverse side of the dial-plate, it is signed 'Johann Martin in Augspurg 48'.

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