London made 18th century Channel Islands christening cup in the Guernsey manner, over-struck marks for John Duport of Guernsey, circa 1788, engraved 'P.I.F.', 2.76 in. high, 4.72 in. wide, 101 grams
- Engraving - The method of decorating or creating inscriptions on silver and other metal objects by marking the surface with a sharp instrument such as a diamond point or rotating cutting wheel.
- 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.
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