EIR56 has a Centurion with a choice of 2 heads , an Eagle bearer, a standard bearer and a musician. The only difference between EIR55 and EIR56 are the helmets for the Centurion. They have been listed as separate packs to allow the choice of the earlier Gallic I&Js or the later Itallic H and the helmet with the eagle crest. Supplied with the eagle and standard as shown. If you want to exchange the standards with any from other packs just add a note to that effect stating which one you wnt instead of etc.etc.