Value Of This Irish Note?

This is actually quite a collectable Lady Lavery 10/- note.
The fact that it has the ETO War Code (European Theatre of Operations) code M in a circle beside Lady Laverys Portrait,
makes it even more collectable and desirable by collectors.
The Book Value 2007 was listing it at £55 VF £75 EF.
The Central Bank of Ireland Banknotes modelled on Lady Lavery and painted by her husband was reproduced on banknotes of Ireland from 1928 until the 1970s. It then appeared as a watermark on Series B and C notes until the latter were replaced by the euro in 2002.

I was looking at a pile of Lady Lavery 10/- notes at a London coin dealer's 2 weeks ago, and the cheapest and commonest ones in around Fine were selling at £15, so I think you've done really well!

Arkie - Ireland was in a currency union with the UK until 1979 when the Republic of Ireland joined the European Monetary System and the two currencies started to drift apart.