Polar dials are rather unusual. They register
the hours between 6.30 am and 5.30pm
The dial is made of brass and is available in two sizes --- as shown, with a dial plate
300mm x 450mm (12" x 18") [ref P2], or, a smaller size of 250mm x 300mm
(10" x 12") [ref P1]. This dial is supported at an angle of 52 degrees by
two pierced brass supports. For other latitudes please enquire.