If you refer to the British decimal Five Pound (Crown) coin, they have been legal tender since 1990 when they were first introduced.
The Five Pound coin assumed the mantle of "Crown" from the discontinued 25 Pence coin.
The Five Pound coin, the 25 Pence coin and the predecimal Crown (Five Shillings) all have the same dimensions.
Although the Five Pound coin is legal tender, there is a reluctance by some businesses to accept them due to their unfamiliarity. Any bank will accept them and the Post Office has a stated policy of accepting them for any Post Office related goods and services.
The One Pound coin replaced the One Pound note in the British currency in 1983. Pound coins include the One Pound and Two Pound coins, and the Five Pound coin which is issued as a commemorative but is still legal tender.
The Royal Mint produced 89.886 million 1996 One Pound coins, many of which are still in circulation.
These coins are still in circulation. Unless they are in mint condition, they are worth One Pound.
A One Pound with "no faces on it" is possibly a Guernsey One Pound coin. These coins 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 One Pound in Guernsey. The Bailiwick of Guernsey currency (GGY) is pegged at par with the British Pound Sterling (GBP) and the Guernsey decimal coinage is near identical in dimensions, composition and history to the equivalent British coins. Guernsey currency is "legal tender" only in Guernsey, but may be regarded as "acceptable tender" in Britain.
One pound of anything weighs one pound.
1,300 divided by 1 = 1,300 One Pound coins
All genuine British general circulation One Pound coins are 3.15 mm thick. It is possible that one of the many types of fake One Pound coins may be thinner.
Two Pound coins are heavier. One Pound coins weigh 9.5 grams. 1997 to present bimetal Two Pound coins weigh 12 grams. 1986 to 1996 nickel-brass Two Pound coins weigh 15.98 grams.
One thousand one pound coins would weigh approximately 1,000 pounds, as each coin weighs about 1 pound.
A British One Pound coin weighs 9.5 grams, so about 10.5 One Pound coins would weigh 100 grams.
The British One Pound coin weighs 9.5 grams. Therefore, 100 One Pound coins weighs 950 grams or 0.95 kilograms.
There is a one pound coin and a two pound coin but not a three pound coin.