Collection of pages from K&E catalogs for the 400 family of Polar Planimeters
Model 400 from the 1881 catalog
The early catalogs do not have a good description of this planimeter.
The following models are part of the 400 family:
- 400 ------ Polar Planimeter
Of the catalogs available the 400 Polar Planimeter family first appeared in the 1878 catalog.
- 1878 -- The 400 is first seen in the catalogs available. It was probably available earlier.
- 1881 -- Of the catalogs available this was the last showing.
Links to catalog pages for the 400 family of planimeters: