Four Circular Slide Rule Calculators

Four Circular Slide Rule Calculators

Various

Circa

1900

Country of manufacture

UK and Ireland

Categories: Scientific, Calculating

Description

Single sided Lord’s calculator by Elliot Bros. london-£300

Calculigraphe Double-sided [scratched name Chevassut on dial]-£170

Boucher double-sided by Stanley [loop missing from turn-£240

Single-sided calculator unsigned [Mechanical Engineer type-£150

All above in working condition

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Dealer information

Fletcher

Fletcher Wallis

Fletcher Wallis sells objects and books relating to the history of science, medicine and technology from his unit at Admiral Vernon Arcade Portobello Road. He publishes books through Vernier Press, including Antique Medicine Chests, and Corkscrew Patents from 1795. He has been dealing for thirty five years.

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