J W Benson Sterling Silver Pocket Watch with Chain Key
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J W Benson sterling silver pocket watch with chain and winding key. 54.0 mm case diameter with white Roman numeral dial and seconds sub dial at 6 o'clcok. Stamped J W B & lion passant inside denotes sterling silver, and the leopard's head: the town mark of the London assay office and the letter 'S'denotes date of manufacture. The watch has a key-winding movement with a winding key included on 20 curb chain attachment with swivel clasp end. The movement is signed and also includes the patent number 4658, this was for an integrated dust ring. The movement is protected by an inner hinged cover. The watch itself measures 50 mm in diameter. Some marks to outer case and a few indentations.
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- Sterling Silver - Sterling silver is a mixture of 92.5% pure silver and 7.5% of another metal, usually copper. Fine silver is 99.9% pure silver, and is relatively soft and the addition of the very small amount of copper gives the metal enough strength and hardness to be worked into jewellery, decorative and household objects.
- Movement - The technical name for the workings of a clock or watch, and does not include the dial or case.
- Assay / Assayed - Assaying is the testing of a metal, most commonly silver and gold to determine its ingredients and quality. In Britain, once an item of silver or gold has been assayed, a mark is stamped on it, certifying its purity. Known as hallmark, it derives its name from the Guild Hall of the Goldsmiths' Company, who recieved its Charter in 1327 giving it the power to assay and mark articles of gold and silver.
- Date Aperture - A date aperture is a cut out section in the face of a watch or clock, displaying the day of the month.
This item has been included into following indexes:
- Benson, J. W. (England)
- pocket watches, case type - open face, silver case 570