Praga Surface Grinder 451 Operator's Instruction and Maintenance Manual with Electrical Diagrams (this machine is a copy of the Jones and Shipman 540).

Praga 451 Surface Grinder Parts Manual as Exploded Component Drawings (this machine is a copy of the Jones and Shipman 540).

KEARNS 451 and 721 Horizontal Borers. Detailed and very well-illustrated Sales and Technical
Specification Catalogue. 40 pages.