Original 1937 - 1947 Harley Davidson Instructions (owners manual) For Running and Adjusting 45" Side by Side Valve Twin Models and Servi-Car. 

     There is a Lot of Information in this Booklet: 

Left & Right Side Descriptions

Starting Motor

Adjusting Tappets

Timing Crankcase Breather

Ignition and Timing

Timing Gears Correct Alignment

Repairing Drive Chain

Chassis Lubrication

Adj. Clutch Chain

Adj. Clutch

Taking Clutch Apart

Adj. Carburetor

Wheels

Adj. Hubs

Wiring Diagram

Generator Charging Rates

Replacing Generator Brushes

        Manual has clean pages, Overall is in Near Mint Condition. 

"If you like motorcycles you can't get enough; 

but if you don't you just cuss them out".
                William H. Davidson