Typical hints of counterfeits are poorly imitated packaging (e.g. with a black instead of white Montblanc star on the mountain symbol) as well as a characteristic notch on the cap rings that does not occur on originals. A well-founded comparison can be found in the Vergleich-Rollerball PDF on fountainpen.de. Counterfeit briefcases as well as Meisterstück, StarWalker and Scenium imitations are frequently offered by a few professional sellers. In suspected cases, it is recommended to inform both the seller and eBay.