If you mean Raphael Geminiani, then this is what Michael Kone and Sheldon Brown had to say:
A major bike of the French glory years. Many were rather unexciting, but be on the lookout for high-end examples from the early 60's with French component exotica. In prime (less than 57) sizes in nice condition top-end models with the right stuff could be worth $ 1,500 or more. The pedestrian models perhaps a few hundred at best. French bikes from the 50's and 60's are tricky stuff to understand and price.