Let's see if I can get the pic here..is this it?
If this is the same bow that was on the other site, It looks exactly like a 64” silver sovereign tartan that I saw on Teh bay.
I saw a 66” silver sovereign highlander that had just a bit more decoration in the riser, but otherwise was a twin for the tartan
Given that, I’d place bets on it being a silver sovereign of some type.