The pen was made by the small Montblanc factory in Barcelona, Spain. After the WWII, Spain forbid import from Germany so a German family, Wiese, started a small factory to manufacture Montblanc pens, using their patents. The pen is based on the Montblanc 342, 344 and similar models. It’s slightly larger then the 342 and slightly smaller then the 344 model. The mechanism and quality are identical. These Spanish models use a unique celluloid and today are among the rarest of the Montblanc, with only a small number known to exist. By the way, the “W” is pronounced as if it were a “V.”