An antique pocket sundial compass, pantochronometer

or 'Magnetic Dial', dating from c.1850. This particular type of floating sundial compass was patented by the London instrument maker Samuel Porter in 1824, who referred to these instruments as 'Magnetic Dials' and often labelled them to that effect on the base.

This example features a turned wooden case and floating sundial compass card, incorporating a brass gnomon under a domed glass. The compass is in full working order and finds North very well.

The underside of the lid has the name A Rowland, Dorking, June 1878. On the base is an old label entitled ' The magnetic time indicator and compass'.

Approx 5.5cm w x 2.8cm h.