Mel, That was an interesting exercise.
I think the wavy lines and dolls eyes relate to underwing and centreline stores carriage, possibly emergency ejection (which of course should have told me it wasn't an RF-101). I saw the same instrument in another attack aircraft cockpit picture. The three digit display to the left could be a DME readout with an Off flag. I was amused to see the 2000 fpm descent rate.
A small digression before continuing. I found this while following the COIN blind alley. A fascinating history of how the OV-10 Bronco came to be. It started off as an unofficial homebuilt project!
See
http://www.volanteaircraft.com/ov-10.htm
How about this one. Looks can be deceiving:
