On July 1, 1965, at approximately 5:45 AM, Maurice Masse was working in his lavender field when he heard a whistling sound. Investigating, he discovered an egg shaped object, approximately the size of a Renault Dauphine automobile (roughly 8 feet long), resting on six legs in his field. Near the object, he observed two small beings approximately 3.5 feet tall, with large bald heads and small features, crouching near lavender plants.

According to Masse's account, when he approached within 5 meters, one of the beings pointed a tube shaped device at him, causing immediate paralysis. He reported remaining conscious but unable to move or speak. The beings then entered the craft through a sliding door, and the object rose silently before departing at high speed. Masse reported remaining paralyzed for approximately 20 minutes.

Investigators documented a circular imprint 3.3 feet in diameter at the alleged landing site, with the soil reportedly hardened "like cement." Most notably, lavender plants would not grow in the affected area for approximately ten years, a phenomenon studied by French agricultural authorities.

Maurice Masse was a lifelong resident of Valensole, a region in Provence famous for lavender cultivation. At the time of the incident, he was 41 years old and had been farming his family's land for many years. He had served in the French military during World War II, participating in the Italian campaign and the liberation of France.

Investigators consistently described Masse as sober, practical, hardworking, and deeply reluctant to discuss the incident publicly. He was a respected figure in his community, known for his honesty and no nonsense demeanor. He had no prior interest in UFOs or science fiction, and repeatedly expressed frustration at the attention the case brought him.

The French Gendarmerie conducted an official investigation and found Masse to be entirely credible. His account was also investigated by French aerospace researcher Aimé Michel and, years later, by GEIPAN (the French government's official UAP investigation unit), which maintains the case in its archives.

The Valensole case is considered one of the strongest physical trace cases in UAP research. Investigators noted several factors supporting Masse's credibility: his established reputation, lack of motive for fabrication, the physical evidence at the site, and the consistent, understated manner in which he recounted the event over decades.

French authorities, including the Gendarmerie and later GEIPAN, found no evidence of hoax or misidentification. The documented vegetation effects and soil changes have been cited by researchers as among the most compelling physical evidence in UAP literature.

Skeptical perspectives have suggested possible misidentification, sleep paralysis phenomena, or psychological factors. Some researchers note the similarities between Masse's description and science fiction imagery of the era. Proponents argue that Masse's character, the multiple forms of evidence, and the official investigations counter these explanations.

The case remains officially unresolved in French government archives and continues to be studied as a benchmark for close encounter investigations.

Maurice Masse's encounter became a cornerstone case in European UAP research and significantly influenced the French government's approach to investigating anomalous aerial phenomena. The Valensole case is frequently cited in discussions of physical trace evidence and witness credibility standards.

Masse passed away in 2004, having maintained his account consistently throughout his life while avoiding publicity whenever possible. His testimony continues to be studied by researchers worldwide, and the Valensole case remains a standard reference in close encounter literature.