The Potter SC 1080 Magnetic Tape Drive Unit is typical of many of the early tape drives. It could operate at speeds of 150 isp (inches per second) and handle all industry standard formats, such as 1600 bpi, phase modulated recording. Tape reels usually held 2400 feet of tape. Rewind speed was 290 ips, which could rewind an entire reel of tape in less than 100 seconds. Made by Potter Instrument Company, Plainview, New York.