This is a key used to open canned meat called Spam. Other items used it later. A little piece of metal stuck out, you put it in the little slot at the bottom. You would turn it backwards and twist it all around can and it would remove the top.
Toyland, toyland, little girl and boy land, when you dwell within it, you are ever happy there. Childhood toyland, mystical merry toyland, once you pass it's borders, you can never return again. We all passed it's borders a long, long time ago,