Through three definitive series from 1968-82, Ireland used Celtic animal images as the basic designs, done by Heinrich Gerl. One of the higher value images is a winged ox. Shown here is the 10 p value (Hib #D66) from the 1971-4 series in decimal currency, printed on watermarked paper.
The winged ox image was probably first used by the ancient Assyrians. The second image shows a 13th century Christian ivory plaque. To Christ's right are the apostles John (top) and Luke (bottom. Luke is associated with the ox, and John with the eagle. Coincidentally, the Celtic eagle is the image used on the highest value of the Irish definitives discussed here.