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Hallmarks include information not only about the precious metal and fineness, but the country from which the item was tested and marked. Some hallmarks can reveal even more information, e.g. the assay office, size of the object marked, year the item was hallmarked - referred to as a date mark (also known as date letter). [2]
The BIS system of hallmarking of gold jewellery began in April 2000. The standard specifications governing this system are IS 1417 (grades of gold and gold alloys, jewellery/artefacts), IS 1418 (assaying of gold in gold bullion, gold alloys and gold jewellery/artefacts), IS 2790 (guidelines for manufacture of 14, 18 and 22 carat gold alloys only ), IS 3095 (gold solders for use in manufacture ...
The symbols on the lower arc of the stamp indicates the caliber (7.7mm, 5.56mm or 7.62mm) and R# or R#M# indicate the model (R) and mark (M) of the cartridge, like the Commonwealth L#A# stamp (e.g., R1M1 is the first model and second Mark of a cartridge). Later, the 2-digit year is in the 12 o'clock position and a digit in the 6 o'clock ...
The Polish Mint logo is the letter M on top of the letter W and comes from Mennica Warszawa or Warsaw Mint Portugal (2007–present) Lisbon INCM: Imprensa Nacional – Casa de Moeda (National Currency – Mint House) abbreviation: Portugal (2020–present) Lisbon CASA DA MOEDA: Mint House text: This mark is only been used on commemorative ...
Another type of mark is found on glass baskets. Where the glass handles of the baskets are attached to the base of the basket a stamp is made. [9] Each handler had a specific pattern to help identify which handler attached the handle. [9] The marks began in the 1950s and were instituted by Frank M. and Bill Fenton. [9]
The Della Robbia mark is usually handwritten on the base of pieces with a ship device, and often the initials of the designer and decorator, and sometimes the date. Example initials include: C for Charles Collis; C.A.W. for Cassandia Annie Walker; C.M. for Carlo Manzoni; E.W. and E.M.W. for Emily Margaret Wood; L.W. for Liza Wilkins; R.B for ...
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The purity mark for Irish silver is the harp crowned. The date mark is a letter indicating the exact year in which the piece was made. The typeface, whether the letter is uppercase or lowercase, and even the shape inside which the letter is stamped, must all be taken together to determine the year.