Date: July 31, 1948
Location: Indianapolis, Indiana, United States

Vernon Swigert, an electrician, was standing by the bathroom window of his home when he first sighted an object. He ran to his kitchen where he pointed out the cymbal shaped or domed disc object to his wife. It was about 20 ft across, and 6-8 ft thick. Total time in sight was approximately 10 seconds, during which the object flew on a straight and level course from horizon to horizon, west to east.

Source: U.S. Air Force Project Blue Book Special Report #14 (Battelle Institute Study), 1955

An electrician was standing by the bathroom window of his home, facing west, at 0825 hours on July 31, 1948, when he first sighted an object. He ran to his kitchen where he pointed out the object to his wife. Total time in sight was approximately 10 seconds, during which the object flew on a straight and level course from horizon to horizon, west to east.

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Entry on this case from Brad Sparks' "Catalog of 1,500 Project Blue Book Unknowns":

July 31, 1948. S central Indianapolis, Indiana. 8:25 a.m. Mr. and Mrs. Vernon Swigert saw a cymbal-shaped or domed disc object or rounded coolie hat to the W, about 20 ft across, 6-8 ft thick, 3:1 ratio noted, white without any shine but shadowing on upper right (sun from the left or E), fly straight and level from horizon to horizon W to E heading 90°, first through window facing W then window facing S, altitude estimated at 2,000 ft covering distance of 5 miles (1,800 mph? distance 2 miles? elevation 10°?), shimmering in the sun as if spinning. No sound or trail. (Battelle Unknown No. 8; FOIA)

 

Source: http://www.ufoevidence.org/cases/case675.htm