Hello and welcome! I'm sure somebody will be able to help with this, you'll just have to wait until the right person comes along though.
An image of the mark would help no end.
To capture it on camera, take a tiny amount of talcum powder, (or fine flour) and apply it to the mark, wiping off the excess gently. Some white powder will stick in the etched bits and bring it right up.
Photographing it, at a slight angle (to cut down reflection) against a dark background will hopefully, produce something somebody will recognise.
Nice thing, I'd agree, Scandi-ish.