Now here's one I'd never heard of.
A Winchester model 99 "Thumb trigger"
.22Lr rifle produced 1904-1923
Winchester Thumb Trigger Model 99 : Single Shot Rifles at GunBroker.com
I can't really tell from the pictures if the thumb trigger is a side-push, or a straight down depression.
At any rate it is one really neat little rifle.
A Winchester model 99 "Thumb trigger"
.22Lr rifle produced 1904-1923
Winchester Thumb Trigger Model 99 : Single Shot Rifles at GunBroker.com
I can't really tell from the pictures if the thumb trigger is a side-push, or a straight down depression.
At any rate it is one really neat little rifle.