If on the StarWalker actually a production defect like an enclosed dust particle in front of the diamond is present, that is within the warranty period subject to complaint at the seller; a filled-in warranty certificate is required for this. The complaint can also take place in another Montblanc-owned boutique, not necessarily where it was bought; with concessionaires this does not apply for fairness reasons. On the Scenium rollerball, abrasion of the matt lacquer by friction with clip or cap is material-typical normal and is no reason for complaint, especially since the model is for Montblanc conditions regarded as inexpensive.