The base model is recognisable as an original 146 from the 80s by the ink-view window and the nib and thus no counterfeit in the narrower sense. It is, however, an unauthorised customising, since Montblanc does not give permission for such refinements. In the collector scene it is known that, e.g., a Belgian collector occasionally fits 146s and 149s with sterling-silver overlays and engravings; such individual pieces do not violate trademark law but may not be sold. The pen is then no longer an original Montblanc but an individualised collector's piece.