Flown Apollo 9 Command Module flown cue card

This oddly shaped cue card fit snugly into a particular spot on the command module control panel. The cue card provides quick instructions for problems faced by the crew.

I really like this cue card because some of the issues it deals with – such as Oxygen, CO2, Glycol, and Cyro – uses instrument readouts found on Apollo Command Module Main Control Panel 2F, and an unflown example of a block 1 version of this panel is in my collection. The CM Panel 2F controls the Cryogenics and Environmental System controls and is positioned in front of the CM pilot and LM pilot.

In the photo below, taken prior to launch, you can see the Apollo 9 crew with their checklists and cue cards as they prepare for the mission.