Attached to this message is a short (5 sec) video clip from February 29, 1992 - the first show of the first leg of Zoo TV. The video's not great quality, but in it The Edge is clearly visible playing a black Fender Strat. It was also performed this way at the March 3 show in Charlotte and the March 5 show in Atlanta - I was there and I remember thinking it would be cool if had played it acoustic. I'm not sure how many other shows on that leg it was played electric, but I know it was at those three at least.
BB