1970 British Penny
The 1970 British penny was only struck for proof sets, with the last circulating predecimal pennies being dated 1967. In total, 750, 476 proof 1970 pennies were struck between 1971 and 1976, making it the highest mintage non-circulation penny.
At the time of striking, the Royal Mint was in the process of moving all operations from London to Llantrisant: as a result, 102,274 1970 pennies were struck in London and 648,202 1970 pennies were struck in Llantrisant.
|4th April 1971 - 31st March 1972||16,720|
|1st April 1972 - 31st March 1973||85,554|
|4th April 1971 - 31st March 1972||53,043|
|1st April 1972 - 31st March 1973||510,000|
|1st April 1973 - 31st March 1974||74,293|
|1st April 1974 - 31st March 1975||19,814|
|1st April 1975 - 31st March 1976||52|
The 1970 pennies struck in London and Llantrisant (and indeed the sets they come in) are indistinguishable.