Lot 578: Collection of 9 Circular Slide Rules / Calculators Incl. Fowler

Assortment of nine (9) circular slide rules, calculators, or measuring devices. 1st Item: Fowler’s Jubilee Magnum Extra Long Scale Calculator, by Thomas Fowler, Manchester, England, in leather case.2nd Item: Fowler’s Textile Calculator, Short Scale Type, SN 6639, Manchester England. 3rd item: Fowler’s Magnum Textile Calculator, Fowler’s Calculators Ltd, Manchester England, in leather alligator case.  4th Item: Fowler’s Universal Calculator, reverse with “1255 Fowler’s Calculator, The World’s Best, in leather case. 5th Item: Fowler&s Textile Calculator Type B (variant), Manchester England. 6th Item: Halden Calculex, Pocket Model, Manchester, England, with fitted clamshell metal case and instruction booklet. 7th Item: Loga Circular Duplex Slide Rule 30Tt (Scholar), Switzerland, in leather zippered case. 8th Item: R. Reiss GMBH Pocket Watch Slide Rule, Liebenwerda, Germany. 9th Item: H.C. Calculigraphe, by Henri Chatelain, Paris, France, ca. 1900. Based on Boucher’s System; two sided glass. Items range in size between 2 in. D. to 5 1/2 in. D.

PROVENANCE: Private West Tennessee collection.

CONDITION: Each item in very good condition, with appropriate usage wear. 4th Item (Universal): Initials scratched into leather case. 9th Item (Calculigraphe), disk does not turn.