~GREEN CARD PRISMATIC COMPASS IN MAHOGANY SURROUND~

~GREEN CARD PRISMATIC COMPASS IN MAHOGANY SURROUND~

150 GBP ( $195 USD)

A fine green card prismatic compass in solid mahogany base c.1900

Dimensions

10 cm.dia. x 7.5 cm. tall

Circa

1900

Maker

unknown

Country of manufacture

UK and Ireland

Categories: Navigational instruments, Calculating, Engineering antiques, Office Antiques

Description

A fine 10 cm. diameter green card prismatic compass, in solid mahogany base with brass pin temporary lock and brass knurled screw permanent lock. Full 360 degree compass card, engine divided into one degree increments with 8 cardinal points and fleur-de-lys for North (at 180). Central brass pivot point. Simply marked “Made in England” , the instrument is near flawless noting a small loss of enamel on one side of the aluminium sighting vane. Operationally and optically the instrument responds perfectly and points true North (the prism magnifies 2-3 x for ease of reading the compass). The base is turned from a single block of mahogany wood and the glass is held in place by an anodised brass retaining ring. Although late (c.1900), it is a fine and functional desktop item with a pleasing combination of construction materials. No case.

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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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