The number of rings gives no reliable information about authenticity or model class. Earlier Montblanc had a 'class system' from one ring (cheap) to three rings (Meisterstück), which, however, was abolished in the late 1980s or early 1990s. A writing instrument with two rings is in many cases not part of the Meisterstück but the cheaper Generation line and, despite differing eBay descriptions, is not to be classified as a Meisterstück. For valuation, comparison with current sale prices via the forum database is recommended.