Bullion value GBP 4.70 on 15th Sept 2014
Source: Numista
It depends on the condition, but if circulated the coin sells for scrap silver (it is 50% silver) about $8 at the time of writing.
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The value of the 1948 half crown ranges between 1 pound and 2.50 pounds.
About $4.50-$5 in silver scrap. They are 40% silver and generally sell only for scrap value regardless of their condition.
monetary value
rhodesia and nyasaland 1958
Modified coins have no collector value. Any value would be associated with the jewellery.
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.
About two bob or half a crown in old money.
No US coin, including the half dollar has a crown stamp on it when it comes from the mint. Instead, if you have a US half dollar with a crown stamp in it, it was done either by a private company or individual. These stamps generally add no value to your coin and it is just worth what a damaged example of whatever year of half dollar you have is worth.
A $5 gold coin that was minted in 1899 - aka - Coronet Head Half Eagle - is worth in fine condition (F12): $250; its value increases to $400 if it is in a mint state of MS60.