A-26 Invader Erection and Maintenance Manual 1945 AN 01-40AJ-2 Copy H-21 the monitoring and follow-up mechanism

the monitoring and follow-up mechanism and the transmitter for operating the repeaters

covering weights of 12500 and 14000 lbs on one panel

But overall

The mach number limit is displayed at MPH by the red pointer and by the mach number in the inset window at the inside 3 o'clock position

when learning its true origin and purpose

A-26 Invader Erection and Maintenance Manual 1945 AN 01-40AJ-2 Copy H-21 the monitoring and follow-up mechanismThis is a 560+ page photocopied Erection and Maintenance Manual for the USAAF Douglas A 26 Attack Bomber in a 3 ring binder. Appears complete, but have not verified every page. Black and white photocopy.