Model numbers like 146 or 161 are only engraved on the middle cap ring of Meisterstücks until the end of the 1990s; after that this practice was abandoned. On smaller writing instruments like Mozart (114) or the Generation, the number is also missing; there mostly only "Montblanc" or "Montblanc Generation" as well as "Made in Germany" stands under the clip. A missing model number is therefore no indication of a counterfeit. A serial number in the clip is found only on Meisterstücks, and there too not consistently in all production years.