Could be a F-50. Rayk, I don't think it could be a GF 30 because the headstock logo is wrong, and that model didn't have the special inlaid fingerboard.
RC
Except it's a
flatback maple (you can see the bracing as he flips it over his head at the start) and having just spent a little time searching for pics, I think it's actually a pretty rare GF60
M due to G-shield and bound neck.
Also note headstock isn't wide like F50's were, although still appears not quite as narrow as later snakeheads.
Sure looks looks just like GF60 on Westerly Guild Guitars, and note that '87 list said there was a maple version of it:
Also should have diamond-shape inlays but video's so out of focus that can't be confirmed or denied.
Even then it's possible it got a one-off board, you know how that went.
And though there were F47M flatback maples with block inlays I don't think those ever got G-shields.
Or maybe J Hartford just said: "You made D50's with F50 necks for Tommy Smothers. Can you make me an F47M with a G-shield on the headstock?"
And they said: "Sure. You want the horseshoes on the pickguard?"
Which leads us to:
Good song, must be an old video because he is my mom's age, but looks a lot younger there.
I didn't think a GF40 or GF50 was a bluegrass guitar, but apparently it is now.
Let's not forget the F47 was introduced as the "Bluegrass F47" in '64 to replace the F40 on which both those guitars were based, although to be fair it
was a 'hog body.
I noticed this morning there's a pic of a very young Ry Cooder playing one in Hans' book.
EDIT: WHOOPSIE after all that I forgot to look at F44's, could be one-o' those, too: