Map Measurer with Long Handle

Map Measurer with long handle, 35mm diameter, with nickel-plated casing. Double faced scales. One side converting inches to miles and cm to km. Also shows the equivalent in nautical miles. The reverse side shows scales: 1:25, 000, 1:50, 000, 1:75, 000, and 1:200, 000. Supplied in a hanging-up blistercard.