4 1/4" long with one blade.
Does it still qualify as a trapper?
Sorta looks like one but only has one blade.
I looked in a 1952 Queen catalog and I see a similar knife called a "switch".... (Not an auto opener)....
Also, the ones I see in the 1952 catalog don't have the easy open notch in the handles.
Anyway.... sorta looks like a 1964 to 1970s---ish tang stamp.
So, y'all kinda help me out with this guy... if y'all don't mind.
So there you are.....
Jigged delrin? Jigged bone... (maybe)???
I don't know...
Mike

