B-29 Superfortress Familiarization and Maintenance Manual, USAAF 1944 Northrop It is started by depressing

It is started by depressing the silver spring-loaded knob (lower right)

It is in very good condition for its age

Here is an excellent example of the WWII-era Contactor Unit BC-608-A

On this particular instrument

B-29 Superfortress Familiarization and Maintenance Manual, USAAF 1944 Northrop It is started by depressingThis is an authentic B 29 Familiarization and Maintenance Manual as designed by Boeing and published by AAF Publications of the US Army Air Force. This is its first printing, June 1944. The manual, with ~634 pages, describes the following systems of the aircraft in dedicated, color tabbed sections: Introduction (an overview of the entire aircraft with illustrations and diagrams) 30 pages Electrical, 63 pages Fuel System, 38 pages Control Stands and