I've just purchased what was advertised as an early 1905 Canadian Single ring. From what I've read so far it is probably authentic, although Canadian dating information is a bit spotty. It was eBay item # 350834705634. The seller said the serial number is C 72999. Could one of you gentlemen help me ascertain what year it was made? Please take a look at this closed auction and help me out. Any input is appreciated. Thanks.