Quick view Add to Cart Automatic Reversing and Unreversing System, Ref 600 Document Part Number: No. 138 Number of pages: 4Part Number: No. 138Revision Date: 20-Nov-1947Description: Ref 601 - Cementing of Blade Chafing Rings, Ref 602 - Stealing of Stepmotor Electric Heads, Ref 603 Governor Drive Shaft... MSRP: Was: Now: $15.00