Project 10073 Record Card — Winchester, California, 10 June 1956

This document consists of a Project 10073 Record Card and an associated military teletype report regarding an unidentified aerial phenomenon observed on June 10, 1956, near Winchester, California. A civilian witness reported seeing a single, disk-shaped object, described as being white to light pink in color and appearing the size of a half-dollar. The object was sighted at an elevation of 10 degrees above the horizon. According to the report, the object traveled in a straight line before performing a very fast 180-degree turn and subsequently fading out. The total duration of the observation was approximately two minutes. The report notes that visibility was clear and unlimited at the time of the sighting. The military investigation, conducted by the 751st ACWRON and reported by 2nd Lieutenant Richard A. Christensen, officially categorized the cause of the sighting as 'undeterminable.' The report explicitly states that there was no radar contact and no photographs were taken. The document provides precise location details, placing the sighting five miles south of March Air Force Base and two miles north of Coyote Hills, at the intersection of Winchester and Simpson roads.