~UNUSUAL COMPASS/MAP READER WITH EXTENDING ARMS~

~UNUSUAL COMPASS/MAP READER WITH EXTENDING ARMS~

$475 US + shipping(OBO)

An all brass compass or map reader with extendable legs and flawless, semi-circular, flint, biconvex lens

Dimensions

7-12 inches

Circa

1880

Country of manufacture

UK and Ireland

Categories: Navigational instruments, Other Maritime Antiques, Surveying Instruments & Mining, Engineering antiques, Office Antiques, Tools

Description

An all brass compass (pelorus?) or map reader with extendable locking legs and a 5″ semi-circular, biconvex, flint (greenish) glass lens. Housed in twin, slotted brackets the lens is hinged at the base to adjust focal length ( 2-3 X magnification). The lens sits atop a central brass hub with three extendable, slotted arms and knurled locking screws. Closed, the apparatus has a diameter of 7″ (extends to 12″). No signature, however, by the construction I would estimate it is late 19th century in age. The lens is flawless, edge to edge with no scratches or chips. A rare survivor and a very decorative piece !!! 

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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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