You do not specify a country or a denomination.
Elizabeth II appeared on the coins of many of the 50 plus Commonwealth countries.
Assuming you have a British coin (without the country name on it), the coins of copper appearance were made from bronze which is mostly copper.
The 12 sided Threepence was made from brass.
All of the coins of silver appearance were made from a copper-nickel alloy.
It depends on the denomination and condition of the coin. "Elizabeth II Regina" means "Elizabeth the Second, Queen", and "South Africa Suid-Afrika" is simply the name of the country, first in English and then in Afrikaans. All coins issued in South Africa in 1955 had both phrases ("Elizabeth II Regina" and "South Africa Suid-Afrika") on them.
Regina Caeli - 1955 is rated/received certificates of: Belgium:KT
Regina Whitcomb was born on May 3, 1955, in North Hollywood, California, USA.
The Millionaire - 1955 The Regina Wainwright Story 4-14 was released on: USA: 25 December 1957
Elizabeth Wellburn was born in 1955.
Elizabeth Keuchler was born in 1955.
Regina Amstetten - 1954 was released on: West Germany: 2 February 1954 Netherlands: 14 January 1955 Finland: 25 March 1955 Denmark: 26 December 1955 USA: 1956 France: 23 January 1956
Elizabeth Cutter Morrow died in 1955.
Life with Elizabeth ended on 1955-09-01.
Elizabeth Harrison Walker died in 1955.
Elizabeth M. Tamposi was born in 1955.
Elizabeth Cutter Morrow died in 1955.