A Brief History of the Marque
Built in Trieste, these rather attractive motorcycles were fitted with an engine of 48cc. They also produced a cute minimoto and a rather curious-looking scooter.
The Wilier story extends back to 1906 when Pietro Dal Molin of Bassano purchased the little-known English Wilier bicycle marque and began manufacturing bicycles. The Italian brand went on to become quite famous and exists in Trieste to this day as a manufacturer of bicycles.
Considerable history of the marque, very nicely presented at wilier.com where it states, "In 1952 the Dal Molin family sold their ownership to MMM (Meccanica Moderna Milano), which decided to dedicate some departments of the factory in Bassano to assembling Parilla sports motorbikes."
Sources: Willier.com, Henshaw, et al.
Engine is a Franco Motori Morini 50cc. Wilier-Morini-50cc.jpg posted in the gallery
From the forums, 2006:
Hello, I’m on the search for more information such as brochures and pictures of Wilier Triestina and ISAF 50cc Italian lightweight motorcycles.
Both are powered by Franco Morini 3 speed engines and are from the early sixties.