Sun Feb 23, 2014 2:44 pm by nine4t4
Since you're in Hamilton, I'm guessing it's the Mastercraft of Canadian Tire. Before Big Box Stores they had a wider variety of house brands. I'm around 90% that I've seen mastecraft deadlock or two on the back doors of some houses.
Like the tools, they would outsourse and then stamp Mastercraft on the products. In your case literally. The letters are not branded and look almost punched invidually, or like they were held in a jig. You probably knew that.
I seem to remember the Key bow being a sort of clover design. Like a Corbin, The key would have had CCL in an oval. Dominion Lock Corp also had a place in Montreal. they also used a key with a clover bow. Back then even generic blanks were made with bows to match the keys they were meant for. If the key bow isn't a clover then it's a perfect disk. but it's would be from a Canadian MFG from back in the day. Those are the only two that come to mind.
Good luck.
JOB: (n.) a series of tasks that aren't enjoyable, but are done in return for money. see Prostitution
A LIVING: (n.) A means of enjoying ones existence that also provides financial compensation. see Freedom