Comptometer

CO1. Methods of Operating the Comptometer

This manual covers  the Model 'H'. The copper colored machine. 51 pages.

$13.00

CO2. Easy Instructions for Operating the Controlled Key Comptometer

This manual covers the newer Models 922 & 3D11 as well as Models J,K&M.

$12.00

CO3. Methods of Operating the Comptometer

$12.00

CO4. "Stop to Think" The Comptometer "Quicker than Thought"
This manual is also for the "Macroni Box" machine. It has operating instructions. Also has list of accounts that purchased the machine, many customer testimonies, and a price list of 4 different models.

$9.00

CO5. Applied Mechanical Arithmetic as Practiced on the Comptometer
Has over 600 pages of Mathematical applications that can be performed on the Comptometer.

$60.00

CO6. Easy Instructions for Operating the "Key Controlled" Comptometer Adding and Calculating Machine.
An instruction book for the "Copper Colored" Model H. Circa 1920

$12.00

CO7. Comptograph "Victor" Model 12ML Adding Machine
Disassembly and assembly instruction and parts catalog

$17.00

CO8.  Felt's Comptometer 1887 Patent:
4 Wonderful Drawings - 6 pages operational detail.  Printed on very nice paper.

$9.00

CO9.  Service Manual for Model 'H' and Other Early Models Comptometer Key Drive Calculator

$21.00

$9.00