Otis King's calculator or cylindrical rule 'K' type

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Posted by simon swanepoel

18 years ago

AI Appraisal

Description

This cylindrical rule is the 'K' type with the serial number 5440. It is nickel plated and the paper on the inside is black with the writing and markings in white( this is very different compared to other types) It still has it's original case. According to my research this item may date back to as early as 1921.

Category Scientific Instruments

Medium nickel plated steel

Distinguishing marks no

Condition Good

Size and dimensions of this item 6"

Date Period 1919-1977

Weight N/A

History N/A

eBay Auction Link

Price Paid (If known) N/A

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Otis King's calculator or cylindrical rule 'K' type

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