$200 US + postage

A good inclinometer/compass/ruler made in England for the Mexican Government with dual scales


160 x 50 x 10 mm.



Country of manufacture

UK and Ireland

Categories: Calculating, Drawing Instruments, Scales Weights & Measures, Surveying Instruments & Mining, Engineering antiques, Tools


A good folding, boxwood inclinometer/compass/ruler made in England for a Mexican customer with metric and Imperial scales. Signed Isidoro Gluck, Mexico, D.F. (Distrito Federal), the form is a typical, folding 12″ ruler with Imperial measure for degrees and horizontal distance but the angles (0-90) on the hinge are marked “Degrees par Metre” (0-300). The 1″ locking compass flips 90 degrees ( glass sadly shattered but stabilized ). The charts and scales are clear and sharp, the cross hairs for the sights intact, as are the bubble levels both upper and lower. An unusual and rare instrument retailed for the Mexican market. In original leather slip cover.

Isidoro Gluck was an American merchant based in Mexico City. Originally selling optical equipment (the only person supplying eyeglasses at the time), he added engineering and drawing instruments to his inventory when surveyors became important customers. Sold theodolites, barometers, thermometers, scales, rulers, dials and compasses in the 19th century. Address was 3a Calle de San Francisco, Mexico City (D.F).

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CA ScientificaOpticae

Scientifica Opticae

Mark Hacking (Scientifica Opticae Inc.) has been an avid collector/dealer for over 30 years. A former Science teacher, he has an innate love for anything natural or mechanical. Specializing in optical (microscopes, telescopes), surveying, medical, weighing and drawing instruments, he is an active participant of the Scientific Instrument Fair in London. Living in Stratford, Ontario, Canada, with his wife and two children; Mark looks forward to meeting as many fellow collectors as possible, and has a worldwide following on eBay (Sciopti).

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