Typical counterfeit features on the Copernicus are a colourless instead of green gemstone in the clip, a straight instead of concave grip section, a simple white star instead of mother-of-pearl on the cap, a nib fully made of steel and a too short thread with an additional thin silver ring. Striking are also a clip not bent true to the original and an additional separation ring between grip section and thread that points to a converted converter mechanism. Additionally, fake suppliers often use stolen original pictures, partly with reversed nib colour, which can be due to old press photos. A Copernicus as a rollerball never existed; corresponding offers are without exception suspect of being counterfeits. Collectors should warn bidders and report the offer to the platform and to Montblanc.