rare 18th century architects travellling set

Ref 11474 - A rare mid 18th century architects travelling instrument set in the original shagreen case, the ruler is signed by the maker "T Gilbert, no 33 Ludgate Street, London" all complete and with the original instruments. The set comprises of a compass, a folding compass, ruler and the original pencil top, all made from high quality brass and steel. The interior of the shagreen case still has the original red velvet top lid lining. This exceptional set is possibly French and circa 1760/1770. The case measures 5 inches long, 13 cms.

Shagreen is a type of roughened untanned leather, formerly made from a horse''s back, or that of an onager (wild ass), and typically dyed green. Shagreen is now commonly made of the skins of sharks and rays. The word derives from the French chagrin (anxiety, annoyance – a reference to the rasping surface of the leather) which in turn is said to have developed from the Turkish and Persian saghri, literally, the back of a horse. Shagreen has an unusually rough and granular surface, and is sometimes used as a fancy leather for book bindings, pocket-books and small cases, as well as its more utilitarian uses in the handles of swords and daggers, where slipperiness is a positive disadvantage.Shagreen was traditionally prepared by embedding plant seeds (often Chenopodium) in the untreated skin while soft, covering the skin with a cloth, and trampling them into the skin. When the skin was dry the seeds were shaken off, leaving the surface of the leather covered with small indentations.In the 17th and early 18th centuries, however, the term "shagreen" began to be applied to a leather made from sharkskin or the skin of a rayfish (probably the Pearl Ray, Hypolophus sephen). This form is also termed sharkskin or galuchat. Such skins are naturally covered with round, closely set, calcified papillae called placoid scales, whose size is chiefly dependent on the age and size of the animal. These scales are ground down to give a roughened surface of rounded pale protrusions, between which the dye (again, typically green vegetable dye) shows when the material is coloured from the other side. This latter form of shagreen was first popularised by Jean-Claude Galluchat (d. 1774), a master leatherworker in the court of Louis XV of France. It quickly became a fashion amongst the French aristocracy, and appears to have migrated throughout Europe by the mid-18th century.

Antiques.co.uk Ref: ER27F22P

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