Dating british gold hallmarks
The sponsor may be the manufacturer, importer, wholesaler, retailer or an individual.
These are traditional standard marks that can still be used today. Since 1972 the UK has been a signatory to the international convention on hallmarks.
Make sure that you get a 2014 or later edition, because only those contain correct information about British import hallmarks applied to watch cases.
Also be aware that the tables of date letters in most references are only for British silver items, gold and imported items often have different punch shapes for their date letters. There is a lot of information on this page and I know it can be difficult to take it all in; if you are struggling to understand the marks in your watch case please ask me for help via my contact me page.
This shows the fineness of the metal – ie purity of the precious metal content in parts per 1000 in relation to the standard recognised in the UK.
For example 750 parts per 1000 by weight is equivalent to the old 18 carat gold standard.