An antique 'HC' (Henri Chatelain) map measurer, dating from the early 20th century. 35mm in diameter, this is a well made instrument for measuring lengths or distances on maps (Francis Barker made similar instruments to these at around the same time, their version was known as 'The Rotameter'). The dial is calibrated in both inches to the mile and centimeteres to the kilometre. It has a handle, which is screw threaded and removable. Although probably mainly intended for use with maps, this instrument can also be used to measure distances on any flat surface. This instrument was made in France for the British market and is marked on the back of the case: 'Depose HC'. It comes complete with its original leather case.
In very good condition and full working order. The leather case is in very good condition.
Dimensions: 35mm (diameter), length including handle: 118mm