£60 - £100
AN AMSLER PROPORTIONAL POLAR PLANIMETER SERIAL NO. 61937, LATE 19TH CENTURY, CASED.
30.5 cms long (Case)
NOTE: Used to calculate the area of an irregular shape and invented by Jakob Amsler-Laffon in 1854.
Fees apply to the hammer price:
Free Registration
33.6% inc VAT*
Flat Fee Registration
30.00% inc VAT*