Date: | c. 1945 |
Material: | Cellulose acetate film |
Dimensions: | 35 mm × 50 ft. (15.24 m) |
Company: | Recordgraph Corp. |
Location: | New York, United States |
50 ft. loop of 35 mm acetate film holding 1½ - 3 hours of audio in an embossed groove. Used by the FBI and the military, most famously to record the Normandy invasion live in WW II.
