Polar Planimeter

Amsler Polar Planimeter
Marking: J. Amsler
Serial Number: 45390
Type: 2 (extendible tracing arm)
Year: ca. 1910
Size: 27 x 5 x 4 cm

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References

[1]

Alfred J. Amsler & Co.

Amsler-Original-Planimeter. Schaffhausen (ca. 1925).