The Mystery of the Can Key
The object in question is a can key or spanner key, a simple yet ingenious tool that was once commonly used to open metal containers, particularly for items like sardines, evaporated milk, or canned hams. Before the advent of pull-tab lids and can openers that we take for granted today, this key was a household staple.
How It Worked
The can key worked by being inserted into a small tab or strip of metal on the can. The user would then twist the key, which would roll up the metal strip, effectively peeling back the lid of the can. It required a bit…
