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According to Letizia Iacopini the company changed its name and location after the WWII, becoming the ''"Metron Società Anonima Officine Piemontesi Penne Stilografiche Williamson"'', and moving in Via Madama Cristina 132, Turin; to this company belongs to the re-registration of the trademark done in [[1943]] ({{Marchio|69052}}). After war production were some interesting [[Parker 51]] imitation. These pens were made in ringed celluloid in a wide range of colors, with button filler and metal cap.  

According to Letizia Iacopini the company changed its name and location after the WWII, becoming the ''"Metron Società Anonima Officine Piemontesi Penne Stilografiche Williamson"'', and moving in Via Madama Cristina 132, Turin; to this company belongs to the re-registration of the trademark done in [[1943]] ({{Marchio|69052}}). After war production were some interesting [[Parker 51]] imitation. These pens were made in ringed celluloid in a wide range of colors, with button filler and metal cap.  

The company ceased operations in the '50s,  put into crisis like many other fountain pen manufacturers by the advent of the disposable ballpoint pen, but it was still active at least until [[1956]], appearing in [[:File:1956-Annuario-Generale-Industria-Stilografiche-A.jpg|this page]] of the ''"Annuario generale dell'industria e del prodotto italiano"'' of that year.

The company ceased operations in the '50s,  put into crisis like many other fountain pen manufacturers by the advent of the disposable ballpoint pen, but it was still active at least until 1956, resulting in the general industry directory of that year.<ref>see the excerpts published in [https://forum.fountainpen.it/viewtopic.php?f=13&t=18418 this discussion].</ref>

{{BrandChrono|Williamson}}

{{BrandChrono|Williamson}}