Polar planimeter with calibration ruler
Model 532
Description
Polar planimeter (with calibration ruler) (model missing, only box remaining)
Showcase of this model is Case number U 47
References
Separataband M2 im Mathematischen Institut p. 563.
Separataband M3 im Mathematischen Institut p. 97.
Separataband M3 im Mathematischen Institut p. 93.
Separataband M3 im Mathematischen Institut p. 45.