The Montblanc 28, presumably from the 1970s or 1980s, consists of normal plastic, since Montblanc has only been positioned as a luxury manufacturer since 1991. A refurbishment by Montblanc itself is on this model not economically sensible. Polishes act like fine abrasive material and can quickly remove the generally very thin gilding of clips and rings, which is why one should work with fine grit and only in daylight. A counterfeit is on this model de facto ruled out, since the former market value would not have made a counterfeit worthwhile; with missing model number and inscription "W. Germany", a model of the Classic range is presumably present.