There were no Australian 1937 Halfpennies minted.
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.
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.
A 1944 Halfpenny with a sailing ship on the reverse is a British Halfpenny.All British Halfpennies from 1937 to 1967 featured Sir Francis Drakes "Golden Hind" on the reverse.All Australian Halfpennies from 1939 to 1964 featured a kangaroo on the reverse.See the link below.
Modified coins have no collector value. Any value would be associated with the ring.
There is no Australian 1921 Halfpenny with a spurious "E" on it. You may have a genuine oddity. A reputable coin dealer will be able to assist with verification and give a valuation.
An Australian 1942 Halfpenny minted in Melbourne, has no mintmark. An Australian 1942 Halfpenny minted in Perth has a dot (.) after the (Y) in PENNY (PENNY.). An Australian 1942 Halfpenny minted in Bombay has an (I) below the King's head.