Don H. how can it be a "spam can" if it never had a key and tab like a can of spam? Otherwise it would just be a can! I assumed the can was like my cans of Greek M2 Ball .30 Cal for my M1 where there was a key attached to the bottom and a flexible "tab" to fit into the slot in the key. If yours doesn't have these features, it ain't no spam can.
If it isn't a "Spam can", you're on your own.
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