You mean, like the tub of 1933 pennies, or the bucket of 1954's sitting on top of the box of 1955's, on the pile of 1956's...? Well, these minting machines are pretty fast, and were in those days too, relatively speaking. I've always wondered if only 1 1954 penny was made, or only one was nicked. I just can't imagine setting the machine up and getting it to make One Coin. More likely that it made a run, the chap was told to put them all in the melting pot and slipped a few out on his way there. There must be tubs of stuff that never made it to the melting pot - we've all done that at work: "I'll just put that there, and come back for it later", then someone stops you in the corridor and you never quite get back to where you were...