If you really want a traditional 110 that can be snapped open without a thumb stud, you might want to look at the "older" style 110...before Buck changed the radius of the tang (where the backspring touches the blade)...Early 110's could be snapped open by pressing the blade release part of the backspring and flicking your wrist...Buck changed it because it was being viewed as a "gravity knife" and thus fell under the switchblade ban...
I don't have my notes anymore, but I'm sure one of the Buck Historians can tell you exactly when the tang radius change occurred, and a Search on eBay should turn up some reasonably priced examples...
The newer style tang radius keeps a constant pressure on the blade; on the early 110's, you could swing the blade back and forth with the release pressed...there was no pressure on the blade...