English 18 carat gold cylinder watch with gold watch chain Circa 1821

Very fine watch in splendid case
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A very fine cylinder watch with a gold watch chain, made by William Nicoll Junior on Great Portland Street, London, England, circa 1821. This watch features an extremely splendid case with a relief band, crafted from 18 carat gold and bearing London Hallmarks dated 1821. The beautiful four colour gold dial with Roman hour numerals and gold hands. The numbered movement features a splendidly engraved cock, a very fine English quality cylinder escapement and a diamond end stone.
The cuvette and movement are signed and have matching numbers.
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Diameter: 45 mm
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Weight: 92 g
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Signed: W^m Nicoll Jun^r G^t Portland S^t London
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Nicoll
William Nicoll (Junior) worked in Great Portland Street from 1790. He made pocket watches, wall clocks, table clocks, and longcase clocks. He may have been a member of the family of John Nicoll, a clockmaker at 117 Great Portland Street near Oxford Street, which was recorded in 1843. William Nicoll was recorded here in 1832. Therefore, John Nicoll was most likely a son of William.
There were also several clockmakers in Scotland who worked under the name Nicol or Nicoll. Unfortunately, it is not possible to determine whether there are any family connections.