Clinometer Surveyors Sighting Compass Alidade Compendium Hennessy Swansea  Antique

Clinometer Surveyors Sighting Compass Alidade Compendium Hennessy Swansea Antique




Country of manufacture

UK and Ireland

Categories: Engineering antiques, Surveying Instruments & Mining, Technology, Scientific


Civil engineers/ surveyors compendium made by Hennessy Swansea Wales, circa 1870

Fine brass mounted mahogany instrument with original leather case

Probably designed for use as a plane table alidade, the compass with spirit levels and horizontal sights

The lid with inclining sights and 90* protractor arc scale, also with more spirit levels and engraved distance scales

The inside lid houses a separate 90* protractor 

Inscribed with owner J. Richardson CE Neath

In very good sound condition and fully functional

small chip the the mahogany edge of the protractor housing, 

wear and losses to the leather case

Instrument body 3,1/16″ or 78mm square x 1,5/16″ or 34.5mm thick

weight 273 grams

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GB Cog Scientific

As a fine art sculpture graduate I have applied my appreciation and understanding of form and function to my lifelong professional career in the antiques trade. Over forty years dealing in what I considered worthy, within the fields of decorative arts and sciences, I have always purchased over a wide spectrum and look forward to offering an exciting variety of stimulating pieces.

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