Two Old Austin ignition timers and a ED Arrow clockwork timer.

These are old timers from a bygone age of modeling. The two Austin timers were used on Ignition gas engines to kill the engine after a short motor run.by turning off the power to the ignition system. The small diameter timer is missing the contact for the ignition circuit. See photo. Timed against a stop watch it timed out in 3 seconds. The larger one timed out in one second. So, they are only good for display, not for flying. Thee ED Clockwork timer is new, it was still wrapped up in cellophane when I removed it from the package to check its operation. It ran for 16 seconds on a full wind up. I think it was also used to kill and ignition circuit, but I could be wrong..