Ireland was part of the “United Kingdom” until 1922 and British coins were used. Irish coins were not introduced until 1928 and parity with the British currency was maintained until 1979.
The 1928 Coins were issued in (mostly) the same size and denominations as their British counterparts.
The designs, chosen by a committee headed by Senator William Butler Yeats were intended to be apolitical (birds, fish and animals). The obverse side of the coins featured the Irish Harp and the name “Saorstát Éireann” (Free State of Ireland) until 1937 and “Éire” (Ireland) from 1938.
The coins were Farthing, Halfpenny, Penny, Threepence, Sixpence, Shilling, Florin and Half Crown.
The fauna featured Woodcock, Sow with piglets, Hen with chicks, Hare, Wolfhound, Bull, Salmon and Horse.
The Shilling, Florin and Half Crown were originally silver but these were replaced by a less valuable metal circa 1940s. This means that the older Shillings, Florins and Half Crowns are comparatively rare and in some cases expensive.
The Farthing is also comparatively rare as it was effectively obsolete in my lifetime. Likewise there are low mintage for all coins in some years and the 1938 Half Crown is unique and there are only two known 1938 Pennies. Thankfully, the Notional Museum has one of each.
Six of the eight coins were the same size and weight as their British counterparts. The exception was the threepence and sixpence (shown below).
British coins still circulated in the Republic of Ireland during the “parity years to 1979) but Irish coins did not circulate in Britain. As a child in Belfast in the 1950s and 1960s, I usually had both British and Irish coins in my pocket.
It is almost impossible to explain the British monetary “£ s d” (pounds, shillings and pence) in 2020.
The root was the Pound note. A pound was made up of twenty shillings (there was a Ten Shilling note). There were twelve pennies in a shilling.
So looking at the eight coins…40 sixpences made one pound. 240 pennies made one pound. 480 half pennies made a pound. Thankfully I never had to count 960 farthings to make a pound.
Britain and Ireland would go “Decimal” in February 1971. This of course simplified the Mathematics around the Pound (in Irish “Punt”) which would now be worth 100 “new” pennies. This required some planning around conversion.
The Halfpenny ceased to be legal tender on 8th September 1969.
The easiest conversion was the Shilling (1/20 of the old Pound) and Florin (1/10 of the old Pound). On 8th September 1969, these Bull and Florin designs were introduced as 5 pence and 10 pence coins. The old coins were still legal until 1993/94.
Also a 50 pence coin (half a pound) was issued on 17th February 1970, a month after the Half Crown was withdrawn.
The Penny, Threepence and Sixpence circulated alongside the new “decimal” coins, introduced in 1971 for approximately one year.
During the period from 1928 to “decimalisation”, only one commemorative coin was issued …a Ten Shillings Coin in 1966 to commemorate the 50th Anniversary of the Easter Rising.
I am not really a Coin collector. It is very secondary to Stamps. I reckon 172 Irish coins were issued between 1928 to 1969 and I have 125 of them. ..or 73% which is satisfactory for a non-collector.
To be clear, in preparation for Decimalisation (February 1971) some decimal coins were issued in 1969 and 1970 and the last pre-decimal coins were issued (mostly) in 1968 and the last sixpence was issued in 1969.