Vintage Hamilton Watch Co. Model 33 map measurer / opisometer / curvimeter.

Back stamped:

MODEL 33

HAMILTON WATCH CO.

U.S.A.

Made in Lancaster, Pennsylvania by Hamilton’s Allied Products Division, 1941–1957. First produced for military map work in WWII, later sold commercially.

How it works:

Roll the small wheel along a route on a map. The needle reads distance on the dual dial:

• Outer scale: inches (0–39)

• Inner scale: centimeters (0–99)

Also used to measure curved lines on drawings, charts, and plans.

The tracking wheel rolls freely and the needle moves as it traces.

Condition:

Used vintage instrument. Dial is complete and readable with expected age spotting. Chrome/nickel finish shows wear, scratches, and plating loss on the back (see photos). Tracking wheel is present. Overall length about 5 inches.

Includes the cloth drawstring pouch it came in, hand-marked “Hamilton Watch Co. Model 331.” The instrument itself is factory-stamped Model 33 on the back. No original cardboard box or printed instructions.

Please review all photos — they are part of the description. Sold as shown.

Questions welcome before you buy.

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