Yes - the only 1950s penny I found as a schoolboy was a VF 1953. It could only have come from a plastic set. Having said that, over a million were issued so there must still be quite large number around. The real mystery is why they were valued so highly in the late 60s. Mind you, that was also true of all 1953 issues back then - yes, I know it was a one-year obverse, but it was also the first year of the reign so many were put aside and survived in UNC.