A rare piece of German corporate and pharmaceutical history: this Montblanc 234 1/2 fountain pen carries dual branding with the BAYER pharmaceutical company logo, indicating its origin as an executive or client gift from one of Germany's most prestigious companies.

The particular model dates to the late 1940s - early 1950s. It comes from the second series of production of the Montblanc 234 1/2 model, that features the non-telescopic piston filling mechanism characteristic of the post-war production period.

The pen retains its original 14-karat gold nib, which delivers a smooth but rigid fine line with consistent. Black barrel with gold-filled trim showing honest vintage character through surface wear and brassing consistent with 70-80 years of history. Please note the highlighted deformation of the cap, this seems to be a thermal deformation, which affects the aesthetic quality of the pen, but not its functionality.

The 234 1/2 designation represents Montblanc's mid-tier line: "2" indicates mid-tier quality, "3" denotes piston-filling mechanism, and "4-1/2" specifies the nib size.

Bauhaus-influenced design philosophy with clean lines and functional elegance. Fully operational piston mechanism.

This is a genuine find for collectors of vintage Montblanc pens, corporate memorabilia, or pharmaceutical history.

This fountain pen will be shipped in a standard Montblanc giftbox from a later period.