US Army, Technical Manual, TM 9-3416-221-10, OPERATORS MANUAL FOR LATHE, ENGINE FLOOR MTD, SLIDING BED GAP; 28-INCH RATED SWING, 50-INCH OPEN AND 30-INCH CLOSED BETWEEN CE 5 HP, 208/440 V, 3 PHASE, 60 HZ, (LEBLOND MACHINE TOOL CO., MODE 17/28 INCH, REGAL), (FSN 3416-725-3508), AND LATHE, ENGINE, FLOOR PLAIN BED GAP, 17 TO 26-INCH RATED SWING, 30-INCHES BETWEEN CEN 3 HP, 208/416 V, 3 PHASE 50/60 HZ, (MODEL 17 INCH, REGAL)