Coinery, you are right. it is a N over sideways N, not a N over Z, as stated. Although it is also referred to as a N over Z, by some. Most of the readers have noticed the retooled O, and the die crack on the reverse of the coin, but an addition feature of the coin (and all of this Variety) is the double struck A on the Obverse. I didn't make a pic of the Obverse "A", but it is visably double struck. Does anyone have any information on the edinburgh sale? ie...date of the sale...who held the sale ,etc?