K&E 4236 Family of Polar Planimeters
4236 Polar Planimeter
- 4236 ------ Older style, probably early 1950's with tracer point. Marked "MADE IN U.S.A.". Serial #66907
- 4236 ------ Newer style, after 1958 with tracer lens. Marked "MADE IN GERMANY". Serial #25174
- 4236M --- Older style, probably early 1950's with tracer point and scaled for Metric. Marked "MADE IN U.S.A.". Serial #72758
4237 Polar Planimeter (Special scales on a 4236)
- 4237 ------ New style with tracer lens. Marked "MADE IN GERMANY". Serial #26234
62 0001 Polar Planimeter
- 62 0000 --- A 4236 in the new numbering system with a tracer lens. Marked "MADE IN GERMANY". Serial #45377
62 0002 Polar Planimeter
- 62 0002 --- A 4236 in the new numbering system with a tracer point.