Pratt and Whitney Model C 12-inch Lathe. Screwcutting Engine Lathe Operator's Instruction Manual.

Pratt and Whitney Model C Lathe: Relieving Attachment: Instructions and comprehensive gear charts.

Pratt and Whitney 4.5" Thread Miller Model C. Operator's Instruction Book.

Pratt and Whitney 6" Thread Miller Model C. Operator's Instruction Book and Parts Manual as Sectional and Annotated Drawings. Includes a schematic of the gearing system, charts for feed rates and English to metric, metric to English and Diametral transposing changewheel settings.