The British George VI 1951 Penny is a bit of a rare bird as only 120,000 were ever minted. Most others years pennies were minted in their millions apart from 1950 when 240,000 were minted and 1933 when only about 7 were minted. This was because there were enough pennies already in circulation so new ones just weren’t needed. Virtually all the pennies minted in 1951 were shipped to Bermuda.
The humble 1951 Penny can now fetch about £50 on the collectors market. I make that about 12,000 times its original value. Not bad !!