Hoping some of our Scandinavian members will check in here ~ I recently saw an early 20th century piece by a well-known Norwegian maker described as "sterling silver", "marked '830' but much of Norway's sterling is marked such to avoid import/export taxes". Can't recall ever hearing that before, and have certainly not read it in any reference. I do know that pieces by Peter Hertz of Denmark are often marked "924" and at least one of my pieces with the "924" has British import marks for sterling, perhaps there would be some duty or tax avoidance there, but just strikes me as ridiculous that it would be any kind of common practice to mark .925 silver as .830.
~Cheryl
.