Vintage Hockey Puck - "Juvenile Trademark - Canadian Rubber Co. Montreal Limited". Puck is smaller than regulation. It is 2.5 inches in diameter and .75 inches thick.
Found this while dumpster diving and have been hitting a brick wall trying to date it. I do know that the Canadian Rubber Company of Montreal Limited ceased to exist under that name in 1906 so I'm thinking this puck is older than that. Any help would be greatly appreciated.