Newall Jig Borer Model 2443 Mk. 3 Operating and Maintenance Manual with Parts as Sectional Drawings Newall Jig Borer Model 2443 Mk. 3 Operating and Maintenance Manual with Parts as Sectional Drawings, and a copy of the maker's Sales and Specification Catalogue. Manufacturers: Newall Models: 2443 Mk.3 Contents: Operators Manual Maintenance Manual Parts Manual Electrical Diagrams Catalog