Check the listing for details. Chas G Allen Co. Manual Book. Condition: Used. Listed at 10.00 USD. The Chas G Allen Co. Manual Book is a comprehensive guide that provides detailed instructions and information on the products and services offered by Chas G Allen Co. This manual book serves as a valuable resource for customers and employees, offering step-by-step guidance on how to properly use and maintain the products provided by the company. With clear and concise language, this manual book ensures that users have all the necessary information at their fingertips to make the most of their experience with Chas G Allen Co. no front cover it all here