A missing serial number in the clip ring is on older 144s no authenticity exclusion, since Montblanc only introduced consistent numbering from a later point. Original features are, among others, the inscription "Pix" under the clip, a completely gold nib without platinum intarsia as well as a flat feed, which additionally points to an older example. The 144 was, after the relaunch of the Meisterstück Classique size, delivered either as a cartridge or converter filler. With remaining doubts, a direct picture comparison and the search for older forum discussions help further.