The Royal Mint produced 6,382,793 British Sixpences.
In 1878, the British minted many different types of silver coin including Crowns, Halfcrowns, Florins, Shillings, Sixpences, Threepences, some with variations, and the Maundy coins. Please be a little more specific.
The 1923 Australian Halfpenny are relatively rare because there were only 15,000 minted.
There were 654,564,000 British 1967 Pennies minted.
British 1875 Farthings minted at the Royal Mint (no mintmark) - 712,760 minted. British 1875 Farthings minted at the Heaton Mint (mintmark = H) - 6,092,800 minted.
There were 26,977,000 British 1902 Pennies minted.
There was a total of 30,044,000 1911 British Sovereigns minted for circulation.
There were 1,710,946 1892 British Halfcrown coins minted.
There were 29,098,000 1930 British Pennies minted.
There were 154,296,000 King George V 1936 British Pennies minted. There were no 1936 King Edward VIII British coins minted since he abdicated before the coins could be prepared.
There were 2.95 million 1982 British "Uncirculated" Sovereigns minted. There were 20,000 1982 British "Proof FDC" Sovereigns minted.
There were 654,564,000 British Pennies minted with a date of 1967. It should be noted that unspecified quantities of British Pennies were also minted in 1968, 1969 and 1970, but were all dated 1967. These are included in the total.
The Sixpence was first minted in Britain about 1551. Since then there have been billions of them minted, not only in Britain, but in other countries using the old British Imperial currency system. The Sixpence is no longer legal tender in any of those countries and the currencies they belonged to are long since redundant or obsolete. You could only imagine how many Sixpences there might be in coin collections around the world and how many more there might be hidden away in Grandma's cupboard.