In 1928, a new type of dog tag was proposed by gen. bryg. Stanisław Rouppert, Poland's representative at the International Red Cross. It was slightly modified and adopted in 1931 under the name of Nieśmiertelnik wz. 1931 (literally "Immortalizer mark 1931"). The new design consisted of an oval piece of metal (ideally steel, but in most cases aluminum alloy was used), roughly 40 by 50 millimeters. There were two notches on both sides of the tag, as well as two rectangular holes in the middle to allow for easier breaking of the tag in two halves. The halves contained the same set of data and were identical, except the upper half had two holes for a string or twine to go through. The data stamped on the dog tag from 2008 (wz. 2008) included: