Dowding and Doll H-7 Universal Gear Hobber: Operating Manual. Includes a copy of the maker's detailed Technical Sales and Specification Catalogue.

Dowding and Doll V4 Gear Hobbing Machine: Operating Manual with Gear Schedules and Charts. Includes a copy of the maker's detailed Technical Sales and Specification Catalogue.

Dowding and Doll V8 Gear Hobbing Machine (Including Cross feed Head): Operating Manual. Includes a copy of the maker's detailed Technical Sales and Specification Catalogue.

Dowding and Doll V10 Gear Hobbing Machine. Instruction Book. Includes a copy of the maker's Technical Sales and Specification sheet.