Northern Ireland, Bank of Ireland 1.10.1958 P-52d PMG Gem UNC 66 EPQ 5 Pounds (Last Prefix)
S/25 is the last prefix for this type, the design of which goes all the way back to the 1830s, and was for many years instantly recognizable as being a banknote from the Bank of Ireland. Strong eye-appeal is seen on this Gem Uncirculated example, which would be perfect for an advanced type set.