Norden Bombsight Sight Head Type M9B WW2 A complete system comprises a

A complete system comprises a master unit

This is an example of an Autopilot Slaved Gyro Magnetic Compass

(see photo from the SBD Flight Manual showing the location of the indicator at position #7)

As the tachometer received an electric signal from the engine-mounted sensor

Norden Bombsight Sight Head Type M9B WW2 A complete system comprises aThis is an authentic WWII era M9B Norden Bombsight Sight Head as used in bomber aircraft of the US Army Air Force and US Navy, such as the B 17, B 24, and B 29. There are numerous sources on the internet for information regarding the Norden Bombsight, probably the best website is NordenBombsightsbyMoore. com. Tim Moore preserves and restores Norden Bombsights, and this one was restored and certified to working order by Tim, and subsequently acquired