Singer 15-90 15-91 Sewing Machine Adjusters Service Repair Manual Coil Bound NEW

New coil bound adjusters manual for the Singer model 15-91 with the direct drive / potted motor, it also covers the 'stitch mechanism' of the 15-88, 15-89 and 15-90 (the head only, does not cover the belt driven motor). This is a high quality reproduction of the original adjusters manual, it features clear text and illustrations. This invaluable booklet contains many detailed instructions for adjustment and repair, including the P.G. direct drive motor, knee operated carbon speed controllers, light assembly and electrical connections, timing, etc. Measures 8.25" by 5.5", 37 pages. Coil binding allows it to sit flat on your work surface or be folded back-to-back. Original copyright 1935.