Ingersoll Limited Edition Automatic Calendar Wristwatch
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An Ingersoll Biason no. 29 automatic calendar wristwatch, oversize limited edition ref, in 1617 Mk in stainless steel with 2 tone guilloche grey dial, centre seconds, 24 hour, day, month registers, lume dot markers and hands, transparent back, 20 jewel movement, case dia. With crown 53 mm, rubber band, unused boxed with leaflets, working.
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- Guilloche - A form of classical decoration consisting of a repeating ornament of interlacing curved bands, sometimes forming circles, and further decorated with rosettes or other flower forms.
The name is derived from the inventor, French engineer Guillot, who invented a mechanical method of inscribing fine repeating patterns on to metallic surfaces.
On enamelled items with guilloche decoration, the surface is firstly engraved with the repeating pattern, and then covered with several layers of enamel, each of which is fired.
Where the item has not been enamelled the form of decoration is usually called "engine turned". - Movement - The technical name for the workings of a clock or watch, and does not include the dial or case.