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A Rare Nautical Slide Rule by A M GordonScottish, c. 1910, in stiff card with paper scales, entitled 'Scale of Power & Speed for Proposed Vessels ...
Circular Slide Rules - a Halden Calulex and a Fowler's Calculator,both cased, Calculex with instruction booklet, both in good working order
A Collection of Rules and Slide Rules,including a fully brass-bound Stanley No.62 four-fold two-foot boxwood rule in excellent condition, six furt...
Cased Brass Pantograph,
Cased Brass Pantograph,English, C.1850, unsigned on small ivory castors with other acessoris in mahogany case, case length 64cm
A Collectors Lot from a Draftsman's Estate,including T squares in mahogany with ebony edging, rulers in ebony, rosewood and boxwood, set squares,...
A Slide Rule and Two Calculators,A Golden Gem adding machine, American, c.1920, no. 85963nickel-plated, in case; an Otis King spiral slide rule, m...
A Quadrant Clinometer for a Miners Dial19th century, in lacquered brass, with bubble level, rack and pinion operated open clinometer sights, hand ...
Watch and Clockmaker's Tools etc.,two wooden cases containing tools and materials including antique watch keys, Archimedes drill, taps & dies, esc...
A Surveyors level,
A Surveyors level, English, c.1920, signed 'W Ottway & Co Ltd, Ealing London' finished in black lacquer and brass lacquer, in mahogany case with l...
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