Jean-Pierre Armand, Karine Gambier, and Martine Schulz. 3. Short Films from 1978
While released a year later than requested, this title is the closest literal match. It was directed by Gérard Grégory. Sexy Girl (1978) mp4
Several short films from that year carry very similar names: Jean-Pierre Armand, Karine Gambier, and Martine Schulz
Below are the most likely matches based on 1978 cinema records: Sexy Girl (1978) mp4
A mechanic named Pierrot and his accomplices deal with the disappearance of a stolen painting after a partner dies of a heart attack.