An antique pocket curvimeter (map measure) manufactured by the renowned precision mechanics workshop W. Ih. Hauck in Vienna, Austria. The instrument features a solid brass body with a finely calibrated dial mechanism designed to measure distances along curved lines and routes on maps or plans. Included is its original fitted leather pouch. The brass shows natural age-related patina and minor wear, preserving its authentic historical character. A high-quality piece of late 19th to early 20th-century Austro-Hungarian scientific instrumentation.