PROJECT 10073 RECORD CARD — Winchester, Massachusetts, 2 July 1956

This document consists of a Project 10073 record card detailing a sighting that occurred on July 2, 1956, in Winchester, Massachusetts. The witness, identified as a civilian, reported observing a single object that appeared to be the size of a pinhead at arm's length. The object's color shifted between off-yellow, white, and yellow. According to the report, the object initially moved in a very tight circle, completing four 90-degree turns before proceeding in a north-northwest (NNW) direction, where it was eventually obscured by an obstruction at an elevation of 30 degrees. The speed of the object during its straight-line flight was estimated at 700 MPH. The duration of the observation was approximately one minute and ten seconds. The official conclusion recorded on the card suggests that the sighting was possibly caused by a helicopter, noting that the reported adept maneuvering and speed were likely the result of human error in estimation. A secondary page included in the document provides a brief press account from the Greenfield Recorder-Gazette, which describes the incident as a 'reversible UFO' observed in Conway, Massachusetts, on the same date. This press account notes that the witness initially mistook the object for a shooting star or a plane, but its behavior—specifically its ability to reverse course completely and the detection of a low-pitched hum rather than a whir—led to a different assessment. The object was reported to have crossed and recrossed the sky several times before speeding away.