G. Gerlach Surveyor's Protractor in Original Wooden Case Antique surveying protractor manufactured by G. Gerlach, one of the most respected Polish makers of precision surveying instruments. Housed in its original fitted wooden case. Designed for land surveying and angle measurement, this instrument dates to the late 19th or early 20th century. G. Gerlach instruments were renowned for their excellent craftsmanship and were widely used by surveyors throughout Central and Eastern Europe. A fine collectible for enthusiasts of scientific instruments, surveying equipment, and the history of engineering. Please examine the photographs carefully, as they form an integral part of the description. We do not ship to America.