Maybe it's Eric Dolphy at the Five Spot?
Thanks for the feedback, people. I was hoping that I'd stumbled upon the Great Unknown Lost Charlie Parker Recordings. What I have are apparently bootleg discs, all identical 12" red acetate National discs, cut at 78 rpm, with identical handwriting on the labels. These must have circulated among Bird fanatics in the 50's and early 60's, and I guess the two above recordings that comprise one of the discs must have been mistaken for Bird (though I'll still hold out slim hope that maybe it really is him). Or maybe it's just me who's mistaking that one disc for Bird -- the person who made the discs might have known exactly who, what, where, and when but was just too lazy to annotate the label fully. All the other discs contain some of the recordings that eventually ended up on the Philology series. I picture a group of NYC beatniks spinning these platters at one of their get togethers. Or maybe Art Pepper listening to them in his rundown apartment while recovering from a near-overdose.