Elliott (Burdett) Surface Grinder Model 921 Mk. 1 and Mk. 2 Operating & Maintenance Manual. The Parts Manuals (exploded-component and Sectional Drawings) cover both the Mk.1 and Mk.2. The Operation manual is for the Mk.1 but the Mk.2 is identical in layout. Includes an interesting and detailed Sales & Specification Catalogue. Also badged "Burdett" as the makers.