Thank you all.

This is our assessment office, though there are no information about hallmarking on the English page: http://www.sp.se/en/units/weightsand...r/default.aspx
The page in Swedish: http://www.sp.se/sv/units/weightsand...r/default.aspx
Inspecta seems to quality control piping and such things and not silver, at least not in Sweden.

SP explained to me that the normal hallmarking procedure is not a destructive test, but the CCM one is, and the lady I talked to said specifically that the object would be destroyed.
Also, I would also need a makers mark registered in Sweden, and it is kind of expensive. £55 per year compared to your £75 for ten years...
Plus as I mentioned, £40 for every test they make.

If I just send a couple of pieces for hallmarking, then yes, it will be expensive. Better to send more to make up for freight costs. Which by the way is not that bad compared to the normal Swedish freight costs, I guess there is a reason for us being in Zone 3 of Amazons delivery chart.

Will calculate a bit and decide when I get closer to needing a Hallmark.

/Andreas