War Spies(1972)

Original title: La Guerre des espions

Professor Meier has stolen the plans of his own infernal machine, the T-14, and intends to sell to the highest bidder in a transaction organized in an Avoriaz hotel belonging to "Pasha", a mob boss who acts as go between. To retrieve the famous case, the SDECEE release Peter Finshh, a professional gentleman thief, from prison to return to the plans. Peter is ordered to recover the T-14 from the possession of a group of spies in Avoriaz.