The Rek-O-Kut LP-743 was used for playback of transcription discs ranging from 10 to 16 inches in diameter, but it is also capable of playing commercial 78, 45 and 33 rpm phonograph records. It contains an Audax 16 tonearm.Source: Vinyl Engine. "Rek-O-Kut LP-743 Owners Manual," Library / Rek-O-Kut.
Markel Playmaster, Model 74
The Markel Playmaster 74 is usedfor playback of 33, 45 and 78 rpm phonograph records. It can hold up to twelve 10 inch records, ten 12 inch records or twelve 7 inch records. It can be set to play one or both sides of queued records automatically, and features automatic shut off. 115-117V, 60CSource:…
The Webcor 228 was used for recording and playback of dictation on magnetized wire. It contains a 2 inch speaker and a removable drum. Features include start, stop, rewind, two push button controls, and a recording time upwards of 15 minutes. 105-120V, 70WSource: "Service Bulletin 37, Basic Model…