~ A FINE WILLIS PATENTED PLANIMETER by ROBERTSON, NY~
$200 USD + postage
A rarely used Willis planimeter made by Robertson c.1903
Dimensions
10 x 4 x 2 inches
Circa
1903
Maker
Willis/Robertson
Country of manufacture
North America
Description
A fine and cased Willis-type planimeter with rotating boxwood scales, blued steel slide for rotor, nickel/chrome arms capable of measuring 45 sq. in. at a time, instructions for use, original inspection tag, dated and serialized. Patent dates on axis/pivot point. Rarely used and in it’s original brown card case measuring 26 x 11 x 4 cm. (~10 x 4 x 2 inches). Sold for $20 then ($750 today).
Ask the Dealer
Dealer information
ScientificaOpticae
Scientifica Opticae
Mark Hacking (Scientifica Opticae Inc.) has been an avid collector/dealer for over 30 years. A former Science teacher, he has an innate love for anything natural or mechanical. Specializing in optical (microscopes, telescopes), surveying, medical, weighing and drawing instruments, he is an active participant of the Scientific Instrument Fair in London. Living in Stratford, Ontario, Canada, with his wife and two children; Mark looks forward to meeting as many fellow collectors as possible, and has a worldwide following on eBay (Sciopti).
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