The Blue Panther
Marie Chantal contre Dr. Kha (original)
Marie-Chantal travels by train to her cousin's place to spend a winter holiday, when a stranger - apparently a fugitive from someone aboard - entrusts her with a jewel in the shape of a tiger with ruby eyes. Unknown to her, these false jewels contain a virus powerful enough to destroy all humankind. Doctor Kha is just one among many spies from different nations trying to get their hands on the tiger, or Marie-Chantal... It will give any nation a tremendous control over all others! Marie-Chantal, a snob girl, will evade all attacks by sheer female cunning, and shows tigerish qualities in dealing with her male, and female foes.
Starring Marie Laforêt, Francisco Rabal, Serge Reggiani, Charles Denner, Stéphane Audran, Akim Tamiroff, Roger Hanin, Antonio Passalia, Pierre-François Moro, Robert Burnier
Watch "The Blue Panther" from streaming services Kanopy, Amazon released in 1965. It's a crime and action & adventure movie, and has a rating of 5.3 out of 10 from Imdb which is fairly okay for this kind of movie.