Hello, in my opinion, there are differences between a Knight's Cross of the MMThO made during WW1 and one made, let's say in 1930. The original crosses (I mean those made for the Order's Chancellery in the late XIX - early XX Century) were all made of gold and (most of them) hallmarked with maker's mark ("F.R." in a rhombus for C.F. Rothe & Neffe, Wien, official suppliers of the Order) and gold content's mark: both marks struck on the ornamental loop soldered to the upper arm. There is also evidence of original Grand Crosses (also made of gold), not being hallmarked: the difference between an original piece and a post-war one is in the extremely high quality and other well-visible differences, especially to the centre medallion of the sash badge. After WW1 and until the early 80s, Rothe regularly sold reproductions of almost all Imperial Austrian orders (and some decorations, like the Honour Medal for Arts and Sciences, the Golden Jubilee Medal 1898, etc.): all pieces were made from the original dies, but their quality -although very good- was quite far from a piece made before 1918. Now, Rothe-made repros are widely collected (there exist also fakes of Rothe copies...). Now, messrs. Horvath of Budapest sell copies of all classes of the MMThO (the breast star is a cast from a Rothe-copy) of a relatively good quality. Best wishes, Elmar Lang