This is the place where the majority of the warbird (aircraft that have survived military service) discussions will take place. Specialized forums may be added in the new future
...but you're too old for that so here are some instruments!
Angle drive tachometer, which I believe is for R4 or R5.
Early A9 magneto switch with extra position for electrical system checks. Used on early L5's and several other early warbirds before they decided to truly isolate the electrical systems from the ignition systems.