Ahh...
I think the first one was Cream's Tales of Brave Ulysses, Eric Clapton doing the Wah-ing. At least, that's recieved knowledge.
That particular Strat belonged to Homer Haynes, originally. Some kind of singing comedian, I think...
Edit:
Ah, c--k. it was Chet Atkins in 1961, wasn't it? Boo-boo Stick Beat?