HEB H.Ernault-Batignolles OP320 and OP420 Parts Manual HEB (H. Ernault-Batignolles) OP320 and OP420 Lathes: Parts Manual as superb Exploded-Component Drawings and Electrical Schematics. English and French text. 158 pages Manufacturers: HEB H.Ernault Batignols H.Ernault Ernault Models: OP320 OP420 Contents: Parts Manual Electrical Diagrams