Here's the evidence folks -
First, we have the Harmony Sovereign guitar at the back, well played & photograhed in the 60's
Secondly, a Fender Telecaster, one of Keef's fave guitars. He has tons of them so the single coil front p/u & a Bigsby looking tremolo must be one of the ones he keeps for practice.
Thirdly, check out the finger position on the left hand. Yes, it's in open tuning, shades of BS, SMU, HTW, you name it.
Definitely our Keef alright