Yes, approximately 336,143,250 British 1968 10 New Pence coins were minted for the initial release of coins into the currency.
The Royal Mint advises that from 1968 to 2010 inclusive, there have been 8,266,445,915 5 Pence coins minted.
Most people who collect British coins would collect coins minted before 1968.
The British did not produce Five Pence coins until 1968.
Such a coin does not exist. The British - 1 New Penny was first issued in 1971 2 New Pence was first issued in 1971 5 New Pence was first issued in 1968 10 New Pence was first issued in 1968 50 New Pence was first issued in 1969
"Old" British 5 Pence coins are those issued from 1968 to 1990 and are 23.59 mm in diameter. These include the 5 New Pence coins issued from 1968 to 1981. The larger pre-1991 5 Pence coins were withdrawn from circulation and demonetised in 1991. The new British 5 Pence coins are those issued from 1990 to present day and are 18 mm in diameter. All British 5 Pence coin from 1968 to present day are made from 75% copper and 25% nickel. They have a silvery appearance but no silver content.
The British 5 and 10 New Pence coins were first issued in 1968.
The larger pre-1991 5 Pence coins were withdrawn from circulation and demonetised in 1991. So, unless they are part of a Proof or Uncirculated mint set or are individual Proof or Uncirculated coins and in absolute mint condition, they have little or no value. The smaller (18 mm) coins from 1990 onwards are still potentially in circulation so, unless they are part of a Proof or Uncirculated mint set or are individual Proof or Uncirculated coins and in absolute mint condition, they are worth 5 Pence.
As a general rule, and other than for the odd error coin, there are no rare British decimal coins. There were many non-circulating coins minted as "Proof FDC" which would have bought by collectors when they were released, but they are not especially rare either.
For coins issued in 1968 and later, yes. For coins before 1968, the old system used "d" from the Latin word for penny.
Not much I'm afraid. The set, which comes in a blue wallet and contains Five and Ten Pence coins dated 1968 and Half, One, and Two Pence coins dated 1971, is valued at about US$2.00 according to the Standard Catalog of World Coins.
The 10 New Pence coin was not minted until 1968.
The British 2 New Pence coin was "invented" by the Royal Mint, with an obverse design by Arnold Machin and a reverse design by Christopher Ironside. 1,454,856,250 coins were minted in 1970 for release on "Decimal Day" on the 15th of February, 1971.