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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 four wardens of the Goldsmiths’ Company were tasked with visiting workshops in the City of London to assay (test) silver articles. If these articles were found to be below standard they were originally forfeit to the king, but if they passed, each article received the king's mark of authentication which was the mark of a leopard's head.
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 ...
Initially, hallmarks consisted of the goldsmiths' proper mark which was the maker's mark originally used to identify the silversmith or goldsmith responsible for making the article. The fineness mark, the crowned harp, was applied to 22 carat gold and sterling silver, which was silver of a standard of 925 parts of fine silver in each 1,000.
Historically, the marks were used for few purposes: [5] declaration of the ownership (an ownership mark, for example, livestock branding [6]); identification of the manufacturer and place of origin (manufacturer's mark, maker's mark, later a factory mark); differentiation in order to distinguish between similar items (for example, a date mark).
He became well known for his article Language identification in the limit [10] [2] which pioneered a formal model for inductive inference of formal languages, mainly by computers. Since 1999, an award of the conference on Algorithmic learning theory is named after him.
Colorado authorities have identified the person that died in a former gold mine that is now a tourist attraction.. Patrick Weier, a Mollie Kathleen Gold Mine tour guide, died after being trapped ...
Date nails are also found on utility poles, sometimes in conjunction with a nail showing the height of the pole in feet. The types of nails may have distinguishing characteristics, such as the date nail having raised digits and the "height nail" having incised digits. The pole height will be a multiple of five (e.g., "35" or "40"). [5]