Hi Gaspare, thanks for the links! Imported silver is not stamped with dates, only silver that was made in Sweden can be stamped with a date, since it' was stamped within the timeframe it was made. Also the ring looks like it's been damaged and repaired, if the person went to have it repaired that stamp would have been applied by the Swedish law. It doesn't have to be a german ring, you're right, not an official canteen-ring at least, since it differs from the period advertisements. But it has 830 silver stamp on the inside. I've bought some original Swedish military rings from the person before. This is a gamble for sure.