NAME THAT SEAT!

Last weekend I went to the monthly car show / swap meet in Amherst NH and I saw this bench seat that had me quite intrigued.  I am pretty sure that I have never seen one of these seats before.  The owner of this seat thinks that it is from a 1968+ GTO, though he isn’t 100% sure.

So I ask you – What in the world did this seat originally come out of?  Is it really a GTO seat?  Some other A-Body?  Drop some knowledge on me.