1968 Irish penny flan error E16i - struck in nickel-brass instead of bronze, with a copy of a letter, dated 3rd April 1975, from Royal Mint confirming it was an error. Very rare, uncirculated.

O’Brien Coin Guide: Irish Pre-Decimal Penny Errors

Introduction: This post is a continuation of the research work done by Derek Young and Prof. G.F. Mitchell – first published in the Irish Numismatics magazine. Sadly, this excellent magazine is no longer available and quite difficult to source. The information in this post relates to ‘minting errors’ on Irish pre-decimal pennies. According to a…

1961 Ireland Halfcrown - the differences between the normal and mule reverse

O’Brien Coin Guide: How to identify the Irish 1961 Halfcrown ‘Mule’ variety

The 1961 ‘mule’ halfcrown was struck in error (or, possibly deliberately) from a reverse die from the 1928-37 type.  In 1938 the halfcrown reverse – the side with the horse on it – had been redesigned to improve the striking characteristics of the coin.  A single example of the 1938 trial of the new die…

Ireland Irish coin sixpence reverse

O’Brien Coin Guide: Irish Pre-Decimal Sixpence

The sixpence (6d) (Irish: reul) coin was a sub-division of the pre-decimal Irish pound, worth 1/40 of a pound or ½ of a shilling.  It ‘nickname’ was a ‘tanner’ and it is thought that this is from John Sigismund Tanner, originally from Saxe-Coburg, who was a medallist and designer at the Royal Mint.  The sixpence he designed for George II…

Ireland 1928 threepence coin ireland saorstat eireann eire percy metcalfe

O’Brien Coin Guide: Irish Pre-Decimal Threepence

The threepence (3d) (Irish: leath reul) coin was an Irish pre-decimal coin and a great favourite of golfers who often used it as a green marker.  There were 4 threepences to a shilling and 80 to an old pound.  The Irish name (leath reul) literally meant “half a sixpence” and, unlike many other Irish coins of the time, it…