The Geo V reverse ghosting is a fascinating topic. It’s rarely seen on halfcrowns which have a fairly deep and intricate reverse design, but often seen on pennies, halfpennies, sixpences, and shillings, all of which have a lot of blank space on the reverse designs. The first attempt to eliminate ghosting was on the ‘shallow portraits’ on 2/6 2/- and 1/- 1920-1926, and pennies 1922-1926, which partly succeeded, but not until the modified effigy 1925-26 was it nearly completely successful.