A nice, clean example of a Fowler's double sided Long Scale calculator, contained in its burgundy, velvet lined, nickel plated case, with the original bronzed Fowler's trademark disc on the inside of the lid.

Known as a 'Vest Pocket' model, these double sided calculators were recommended as the most comprehensive and accurate pocket calculators ever made, with this particular model dating to the 1930s.

One side reads 'Fowler's Calculator - Patent - Fowler & Co. Manchester', while the other reads 'Fowler's Long Scale Calculator - Patent - Fowler & Co. Manchester', together with the serial number 17256.

In very good condition, it measures 2½" (approximately 64 mm) in diameter and is in good working order, with very clean scales on both faces, which rotate fully in both directions. Weighing just under 180 grams in its case, it comes with a copy of a four-page instruction leaflet.