Hank's 70's Strat (white, resprayed black, maple 'board, large headstock, various different pickups at different times) is well known, but I was looking through files last night and found a photo of the 20 Golden Dates appearance in London in 1977. Hank is clearly holding the black Strat, but at the side of his amp there is another similar Strat, possibly black (it's a b/w photo) with black scratchplate, etc.
I also dug out a 1980 interview for a German fan magazine in which Hank talks about his main guitar, the pickups and the extra switches and says in passing "I have another Strat with normal pickups". He does mention that it wasn't kept on stage, though so it may be difficult to track down photographs. He did play a sunburst Strat on some of the Lulu Shows in 1975, so it could be that one with a new scratchplate...
George