it's a collectors thing yes I have 75 Stainz, but they all different, from 1968 originals, different years in the production run ie I have 5 brown no1 Stainz , yes they may at first glance look the same but they all have differences, different buffers, some have coloured handwheels, some had the chassis numbered, different versions of the headlight. Then you have all the specials, the aniversary locos, The 3 versions of the Blue Stainz, The christmas locos, limited runs for retailers ie the Primus loco, etc,etc