I found some pictures from the "blufrecchia" website showing a 2004 field trip to ride the roads of Paris-Roubaix:
http://www.blufreccia.com/
Note the green with blue trim 1948 bike with cambio Paris-Roubaix and wooden rims... now there's a rider after my own heart! I don't see any mention of the brand of bike.
Aldo Ross
Middletown, Ohio