There was no 1948 New Zealand Crown minted.
There was no 1948 New Zealand Halfpenny minted.
There was no 1947 New Zealand Crown (Five Shillings) minted. New Zealand Crowns were only minted in 1935, 1949 and 1953.
The New Zealand Halfcrown was issued in most years from 1933 to 1965. Any collector value would depend on the year and condition of the coin.
The 1949 New Zealand Crown (Five Shillings) was made from 50% silver and weighed 28.28 grams.
Mt Tarawera erupted for 8 days in 1948 in NZ.
The 1935 and 1949 New Zealand Crown (Five Shillings) coins were struck in 50% (fine) silver with the remainder made up of copper and nickel. The 1953 New Zealand Crown (Five Shillings) coins were struck in 75% copper and 25% nickel.
European
The New Zealand Penny was first minted in 1940 and last minted in 1965. 1948 was the only year no New Zealand Pennies were minted.
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There was no New Zealand 1949 Threepence minted.
There were no 1943 New Zealand Halfpennies minted.
There were no 1936 New Zealand Shillings minted.