A small 2.75 inch diameter double sided Fowler scale in original nickel case-£90
A larger single sided Fowler long scale calculator, 4.75 inches diameter in scuffed original case-one hinge broken-£90
An Otis King calculator in good condition, in original scuffed card case with set of instructions-£60
Ask the Dealer
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.