Take-off & Landing Checklist Indicator, SBD Dauntless, F4U-1 Corsair

Here is an exceptional specimen of the Take-off and Landing Checklist Indicator as used on carrier-based, WWII-era US Navy Douglas SBC Dive Bombers as well as early 'birdcage' versions of the Vought F4U-1 Corsair Fighter. (see photo from the SBD Flight Manual showing the location of the indicator at position #7)

The indicator presented one of two checklists to the pilot depending upon the procedure to be performed. The procedure is changed from Take-off to Landing and vice versa by rotating the knob in the lower left, which rotates the checklist around a vertical axis.  A backlight would glow from the perimeter of the dial and illuminate the lettering.