Flap Position Indicator Boeing B-17 PN 5911-12
This is a Flap Position Indicator as used in the US Army Air Force Flying Fortress B-17. The part number has been confirmed in the B-17F Erection and Maintenance Manual dated 1942 and the G model dated 1944. See photo of the indicator on the B-17 instrument panel.
Measures 3.25 in diameter and ~4in deep. The dial markings are clear and the glass and case are intact.