Eire Halfcrown - 1961 - RARE 'Mule' Variety Coin

Eire Halfcrown - 1961 - RARE 'Mule' Variety Coin. This coin differs from the standard 1961 halfcrown in certain aspects. For example the letter 'P' is not exactly 'under' the back hoof as on the standard 2/6 coin, but is more to the left of the hoof (see pics). Thanks for looking.