The Halfpenny has never been minted in silver. If you have a "silver" Halfpenny, it is possibly because somebody has silver plated it.
Modified coins have no collector value.
For future reference, please provide a year.
British Halfpennies have not been made from silver for hundreds of years. If you have a 1939 British silver halfpenny, it is because somebody plated it, and it has no value. A halfpenny made from silver would be worth about £20 GBP just because of the silver content.
The value of a 1939 George VI British silver half crown can vary depending on its condition and wear, but ranges between $3 and $20.
Please check your coin. The Royal Mint did not produce any Halfpenny coins from 1808 to 1824 inclusive. George III was king in 1809. George VI was not born until 1895 and did not become king until 1936.
The 1950 Half Crown of Georgius VI is not made of silver, but of cupro-nickel. 50% silver Hlaf Crowns were issued until 1946. Source: Wikipedia
An Australian 1938 bronze Halfpenny (George VI), uncirculated and in absolute mint condition could fetch up to $115 AUD. If it has been circulated but still in good condition, it might fetch anything from $0.75 to $20 AUD. There were 5.174 million minted. An Australian 1938 bronze Halfpenny (George VI)(Proof), uncirculated and in absolute mint condition could fetch up to $25,000 AUD. A reputable coin dealer will be able to give a more accurate valuation.
A king and a ship is probably a British halfpenny, dated 1937 through 1952, featuring King George VI.
All British coins from 1937 to 1952 inclusive feature George VI on the obverse. These include the Five Pound (Quintuple Sovereign), Two Pound (Double Sovereign), Sovereign, Half-Sovereign, Crown, Halfcrown, Florin, Shilling, Sixpence, Threepence (round silver), Threepence (dodecagonal nickel brass), Penny, Halfpenny and Farthing. There are also a large number of coins from most of the various Commonwealth countries that feature King George VI on the obverse.
An Australian 1951 bronze Halfpenny (George VI)(minted in London - mintmark = PL), uncirculated and in absolute mint condition could fetch up to $22 AUD. If it has been circulated but still in good condition, it might fetch anything from $0.50 to $6 AUD. There were 6.96 million minted. An Australian 1951 bronze Halfpenny (George VI)(minted in Melbourne - no mintmark), uncirculated and in absolute mint condition could fetch up to $65 AUD. If it has been circulated but still in good condition, it might fetch anything from $1 to $15 AUD. An Australian 1951 bronze Halfpenny (George VI)(minted in Perth - mintmark = Y.), uncirculated and in absolute mint condition could fetch up to $52 AUD. If it has been circulated but still in good condition, it might fetch anything from $0.50 to $7 AUD. There were a combined total of 29.422 million minted at both Melbourne and Perth. An Australian 1951 bronze Halfpenny (George VI)(Proof)(minted in London - mintmark = PL), uncirculated and in absolute mint condition could fetch up to $25,000 AUD. An Australian 1951 bronze Halfpenny (George VI)(Proof)(minted in Melbourne - no mintmark), uncirculated and in absolute mint condition could fetch up to $30,000 AUD. An Australian 1951 bronze Halfpenny (George VI)(Proof)(minted in Perth - mintmark = Y.), uncirculated and in absolute mint condition could fetch up to $30,000 AUD. A reputable coin dealer will be able to give a more accurate valuation.
I found a George VI King Emperor half rupee 1941 in perfect condition and i was hoping to find the value of it.
Knowing the year would help, but if it has been circulated, it might get up to $2 NZD.
An Australian 1944 bronze Halfpenny (George VI), uncirculated and in absolute mint condition could fetch up to $450 AUD. If it has been circulated but still in good condition, it might fetch anything from $3 to $90 AUD. There were 729,000 minted. A reputable coin dealer will be able to give a more accurate valuation.
An Australian 1952 bronze Halfpenny (George VI), uncirculated and in absolute mint condition could fetch up to $160 AUD. If it has been circulated but still in good condition, it might fetch anything from $1 to $25 AUD. There were 1.831 million minted. A reputable coin dealer will be able to give a more accurate valuation.