The Royal Australian Mint produced no Australian Halfpenny coins from 1956 to 1958 inclusive.
The Royal Australian Mint produced no Australian Halfpenny coins from 1956 to 1958 inclusive.
There were no Australian Halfpennies minted from 1956 to 1958 inclusive.
There were no Australian Halfpennies minted from 1956 to 1958 inclusive.
There were was no Australian 1956 Halfpenny minted.
The last Australian Halfpenny was minted in 1964.
The last Australian Halfpenny was issued in 1964.
The last Australian Halfpenny was minted in 1964.
There was no 1948 New Zealand Halfpenny minted.
Any Halfpenny coins circulating in Gibraltar in 1917 would have been British Halfpenny coins.
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.
A New Zealand 1958 bronze Halfpenny (Elizabeth II), uncirculated and in absolute mint condition could fetch up to $35 NZD. If it has been circulated but still in good condition, it might fetch anything from $1 to $8 NZD. There were 1.92 million minted. A reputable coin dealer will be able to give a more accurate valuation.
New Zealand has never issued a silver Halfpenny. Somebody has possibly silver plated it. Modified coins have no collector value.