Russian silver fineness was measured in 'zolotniks' and '84' corresponding to 87.5% silver is the mark most commonly seen on Russian thimbles Finnish thimbles are usually marked inside the top. Small articles are not required to be marked in Denmark so that one often only finds a fineness mark and a maker's mark either in the top or on the border of the thimble.
There may be a maker's mark, a national mark (crown), a purity mark, a town mark and a date code. Some thimbles may be marked 'Denmark' or 'Sterling'.
Some thimbles will not have marks and this makes them very difficult to identify with certainty.
The term hallmarking dates back to 1478 when goldsmiths and silversmiths had to send their wares to Goldsmiths’ Hall in London to be marked.
However, the concept of marking precious metals to show their purity predates this by well over a century.
Therefore, hallmarking is generally done before the piece goes for its final polishing.
One of the most highly structured hallmarking systems in the world is that of the United Kingdom, (Scotland, England, Wales and Northern Ireland), and Ireland.