At the 3min mark of this '75 Capitol Theater gig you can see Dawson strumin' a cool lookin' Alembic. 'Wonder where that guitar is nowadays??? Buddy Cage also has two Pedal Steels setup (see as camera mags out around 55sec mark)... I think he was making the transition form a Double Neck 10 string Emmons, to a Double Neck 12-string Hilt at this time. Also, Skip Battin on Bass.
Another one from that night (Nelson is playing a Strat! [see 2min:35sec mark]):