Audemars Piguet Royal oak Ref 25860ST/O/1110ST/01 a stainless steel chronograph wrist watch with date and bracelet circa 2000, dial: black grid, applied luminous baton hour markers, white outer minute divisions with 5 minute markers, subsidiary dials at 3, 6 and 9 for seconds, 30 minute and 12 hour recording, date aperture between 4 and 5, white baton hands with luminous inserts, centre chronograph hand, calibre: cal. 2385, 37 jewels, movement number: 470293. Case: brushed and polished tonneau form, back secured by eight screws, eight screws to bezel, screw down crown flanked by twin screw down pushers, no. 17231 2081, closure: Audemars Piguet fitted brushed and polished steel link bracelet and folding clasp. Dimensions: 1.54 in. diameter, bracelet circumference approximately 6.85 in. Signed: case, dial and movement. Accessories: Audemars Piguet Certificat d' Origine dated 28.04.2000, instruction manual, free check-up certificate dated 10.07.2001, two additional links and octagonal diver's helmet design presentation box
- Chronograph - A chronograph is a watch that also incorporates the features of a stopwatch, to measure elapsed time. Most chronographs are operated by two buttons, one to start and stop the chronograph second hand, and the other to return that hand to the starting position.
- 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.
- Oak - Native to Europe and England, oak has been used for joinery, furniture and building since the beginning of the medieval civilisation. It is a pale yellow in colour when freshly cut and darkens with age to a mid brown colour.
Oak as a furniture timber was superceded by walnut in the 17th century, and in the 18th century by mahogany,
Semi-fossilised bog oak is black in colour, and is found in peat bogs where the trees have fallen and been preserved from decay by the bog. It is used for jewellery and small carved trinkets.
Pollard oak is taken from an oak that has been regularly pollarded, that is the upper branches have been removed at the top of the trunk, result that new branches would appear, and over time the top would become ball-like. . When harvested and sawn, the timber displays a continuous surface of knotty circles. The timber was scarce and expensive and was used in more expensive pieces of furniture in the Regency and Victorian periods.
- Movement - The technical name for the workings of a clock or watch, and does not include the dial or case.
- Circa - A Latin term meaning 'about', often used in the antique trade to give an approximate date for the piece, usually considered to be five years on either side of the circa year. Thus, circa 1900 means the piece was made about 1900, probably between 1895 and 1905. The expression is sometimes abbreviated to c.1900.
- Baton Hands - A narrow hand on a watch, sometimes also called a stick hand.
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