Asquith OD1 Mk.2 - also listed and badged as the OD 50/75 Radial Drilling Machines: Comprehensive Instruction & Maintenance Manual (consisting of two manuals in one) with Parts as Exploded Component Drawings and two hydraulic schematics. (This drill usually carries a badge stating "Mk. 2" and has a rectangular drill housing and a hidden longitudinal traverse screw)