Here's a gem I found on ebay this week. It's a puck that was said to used by Hall of Famer Norm Ullman to notch his first ever professional hockey goal in 1953. The link to it can be found here. The listing says the puck comes from Ullman's personal collection and has carved onto it "N.Ullman First Pro Goal" as well as "Dec. 29th, 1953" with the "3" backwards.
The puck apparently comes with a certificate of authenticity. I managed to find the boxscore of this game and low and behold, there's Ullman with his goal. He was called up on an emergency basis from the junior Edmonton Oil Kings in the midst of a 56 goal, 101 point season. His goal was assisted by team leading scorer Enio Sclisizzi and Don Poile. This was Ullman's only pro game of 1953/54 before returning for a full campaign the next. He would collect 59 points in 60 games in 54/55 before finally graduating to the NHL and the parent Detroit Red Wings.
A pretty cool piece of hockey history.