Source:Hewlett Packard/ Sanborn Division., Waltham, MA (1957)
Hewlett Packard/ Sanborn Division. Operating and Service Manual. 60-1300, 60-1300B Sanborn Twin-Viso Recorder. The booklet is divided into the following sections: Introduction, Parts and Controls, Speed Controls, Writing Arms, Operation, Galvanometer Characteristics, Paper Speed, Replacement Parts, Rack- Control Panel, Mechanical Parts, and Sales and Services.