Helpful online resources for dating the Meisterstück 149 are a PDF in the blog whitestar_ftl on livedoor.jp as well as the thread Dating Montblanc 149s in the forum of fountainpennetwork.com. With the help of these overviews, models can be classified quite precisely temporally based on structural features. For example, a bicolour 14K nib combined with a two-part barrel, brass filling mechanism and ebonite feed points to a production time between 1985 and 1990.