The rise in gold prices makes this coin worth more for its metal than as a collectible. Depending on wear, its retail price could range from about $210 to $265.
The value of a 1902 Confoederatio Helvetica 20 coin is determined by its scarcity and the condition of the coin. The value price ranges from 40 to 100 dollars.
Such a coin does not exist. The Royal Mint produced no 1704 Crown coins.
A British 1902 sterling silver Crown (Five Shillings)(Edward VII), uncirculated and in absolute mint condition could fetch up to £265 GBP. If it has been circulated but still in good condition, it might fetch anything from £60 to £175 GBP. A British 1902 sterling silver Crown (Five Shillings)(Edward VII)(Matt Proof FDC), uncirculated and in absolute mint condition could fetch up to £225 GBP. NOTE - The 1902 British Silver Crown was the only Crown coin minted during the reign of Edward VII. 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.
Retail value for this coin is $1.00-$3.00 in average condition.
You need to provide the denomination and any mintmark present on the coin. Values differ greatly between something like a 1902 penny and a 1902 gold double eagle.
There was no British 1886 Crown (Five Shillings) coin minted.
There was no British 1846 Crown (Five Shillings) coin issued.
There was no 1970 British Crown (Five Shilling) coin minted. The last British predecimal Crown (Five Shilling) coin to be minted was in 1965.
The value of the 1948 half crown ranges between 1 pound and 2.50 pounds.
Without knowing more about the coin it's impossible to give a value. Most importantly, be sure that it's really brass and not gold! Brass wasn't a common coinage metal in 1902. If it's a true gold coin its value could be significant.
1 crown, or however much someone is willing to pay for it
The value of a George VI half crown coin will depend upon its condition and how much the seller wants for it. You can expect to pay anything in the region of $1-$30 for this coin at auction.