No, it was made from a copper-nickel alloy.
All British general circulation "silver" coins from 1947 onwards were made from cupro-nickel and contain no silver.
PeterJ.Davies British silver Coins since 1816 makes a comment that "Vip strikings have frosting on designs. This piece may also occur in Sterling Silver"
There was no "Festival of Britain" Florin minted, you possibly refer to the "Festival of Britain" Crown (Five Shillings). See "What is the value of a 1951 British Crown - Festival of Britain".
4000 gbp
The silver content of the 1981 British Royal Wedding commemorative general circulation crown is zero. It is a cupro-nickel coin. No British general circulation coin has had any silver content since 1946. The 1981 silver Proof FDC Crown coin which was sold in a case, has a 92.5% silver content.
There is no documented evidence of a minting flaw in the "Festival of Britain" Crown, but it is possible. A reputable coin dealer will be able to advise.
A British 1951 cupro-nickel Crown (Five Shillings)(George VI) - Festival of Britain (proof like), uncirculated and in absolute mint condition could fetch up to £15 GBP. If it has been circulated but still in good condition, it might fetch up to £5 GBP. A British 1951 cupro-nickel Crown (Five Shillings)(George VI) - Festival of Britain (Frosted "VIP" Proof), uncirculated and in absolute mint condition could fetch up to £675 GBP. A British 1951 cupro-nickel Crown (Five Shillings)(George VI) - Festival of Britain (Matt Proof FDC), uncirculated and in absolute mint condition could fetch up to £4,000 GBP. A British 1951 cupro-nickel Crown (Five Shillings)(George VI) - Festival of Britain (Plain edge - Proof FDC), uncirculated and in absolute mint condition could fetch up to £1,000 GBP. The edge inscription reads "MDCCCLI CIVIUM INDUSTRIA FLORET CIVITAS MCMLI" which is Latin meaning "1851 By the industry of its people the State flourishes 1951". The values quoted are the best possible for the best specimens in their grades, but may be significantly lower due to varying demand for the coin and the prevailing economic climate. A reputable coin dealer will be able to give a more accurate valuation based on inspection of the coin.
All varieties of the 1935 British Crown have a 50% silver content.
A small country which is independent but uses Britain for foreign affairs. The Isle of Man, Jersey and Guernsey are all British Crown Dependencies.
A silver pattern crown coin is a British coin that was produced between 1707 and 1965. This coin is made of silver and has a profile picture of Queen Victoria on it.
All British sterling silver Crown coins from 1887 to 1902 inclusive are 38mm in diameter and weigh 28.35 grams.
The crown is often used as a symbol to represent the government of The United Kingdom of Great Britain and Northern Ireland.
The British 1847 sterling silver gothic Crown (Five Shillings) should weigh in at 28.35 grams with a diameter of 38mm. The 1847 gothic Crown was minted only as a Proof coin, so you potentially have a little treasure.
To determine the proof of a 1951 British Crown - Festival of Britain coin, you can inspect its surface for signs of minting quality. Proof coins typically have a mirror-like finish with sharp, detailed designs and no signs of wear. Additionally, you can check the coin's specifications; the proof version usually has a different mintage and is often made of a higher quality metal compared to circulation coins. Consulting a reputable coin catalog or a numismatic expert can also help confirm its proof status.