- Museum number
This horizontal dial consists of a gilt brass plate in the shape of a shield, with a folding arm to hold a string gnomon (now missing) which cast the shadow and an incorporated compass.
The ARM is decorated at the centre with a coat-of-arms and is engraved with the supposed date of production. The other side of the arm has a small catch which keeps the arm itself folded when not in use.
The OBVERSE of the actual dial PLATE is engraved with hour lines, from [4.30] to 12 to [7.30], numbered by one, divided to the half hour with dots. The centre of the leaf has a compass with magnetic deviation indicated, and the cardinal points abbreviated 'S', 'OR', 'M', 'OC' on the plate outside the compass. On top of the compass are two male figures holding a shield.
The REVERSE of the plate is blank.
- Production date
- 1453 (? inscribed but may be fake)
Length: 80 millimetres
Thickness: 5 millimetres
Width: 59 millimetres
- Curator's comments
- This "Regiomontanus-type" sundial is one of a group of about ten instruments of very similar style and design. They are either associated with the makers Georg Peuerbach or Johannes Regiomontanus, but may have been made by neither. Further research into the matter is needed, but it is highly likely that at least a few of these instruments are fakes. The BM instrument, which was acquired in the Frédéric Spitzer sale, is one of these. A further two sundials of very similar style are part of larger instruments made by Hans Dorn of Vienna. For a complete list and brief discussion see David King, Astrolabes and Angels, Epigrams and Enigmas, Stuttgart 2007, pp. 248-252 (copy on object file).
- Not on display
Latest: 2 (Oct 2016)
5 (1995) Corrosion on reverse, string missing
- Acquisition date
- Acquisition notes
- Spitzer Collection no.2787
- Britain, Europe and Prehistory
- Registration number