Opisometer
Production date
Circa 1970s
Description
A small chrome-plated opisometer with a round body, narrow handle and small tracer wheel attached to the base of circular body. It has a white face, a blue steel needle, a black incremental scale and a glass cover. There are two circles on the face - the outermost reads from 0 - 39 in increments of 3. The other reads from 0 - 99 in increments of 10. The text on the face reads: " Inches to Miles / Centimetres to Kilometres / MADE IN FRANCE". Conversion table on rear face. "H B" stamped near the tracer wheel. It is contained in an orange box with a blue and white paper label which reads: " THE UNIVERSAL MAP MEASURER / IN MILES AND KILOMETERS / For measuring instantly and accurately any distance whether straight, curved, or bent, such as the length of roads, rivers, the sinuosities of coats, etc. / Manner of using the instrument - Place the needle at 39, by turning the tracer- wheel with the finger, run the said wheel over the map, holding the handle perpendicularly, and following closely the line or distance to be measured. The needle will then indicate the distance in miles, or kilometres, according to the map measured and the dial-circle used. (Made in France)." It also has information on the rear concerning conversion and scales. There is also some handwritten text in ink on box lid which reads: "Written off / Comps DRAUGHTING ROOM ( Please Return). / Don't Use / $4.70 / New Plymouth".
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