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…