Lady's Longines Primaluna diamond wrist watch; ref; L81105 in 18ct gold and stainless steel with Mother of pearl dial, Arabic numerals, date aperture to bezel set with 44 round brilliant cut diamonds on a quartz movement, with valuation certificate by Cerrone.
- Movement - The technical name for the workings of a clock or watch, and does not include the dial or case.
- Mother-Of-Pearl - Mother-of-pearl, technical name "nacre", is the inner layer of a sea shell. The iridescent colours and strength of this material were widely used in the nineteenth century as an inlay in jewellery, furniture, (especially papier mache furniture) and musical instruments.
In the early 1900s it was used to make pearl buttons. Mother-of-pearl is a soft material that is easily cut or engraved.
Nowadays it is a by-product of the oyster, freshwater pearl mussel and abalone industries.
- Date Aperture - A date aperture is a cut out section in the face of a watch or clock, displaying the day of the month.
- Bezel - On a clock or watch, the bezel is the metal frame into which the watch or clock glass is fitted. In clocks, the bezel may include a hinge and a flange, in effect a door to the face of the clock. In jewellery the bezel is a band of metal with a projecting lip that holds the gemstone in its setting.
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