That GE looks like some sort of half-concoction between the newer models with white pushbuttons and the older black control models with the silver pushbuttons. That plus the yellow plastic and timer knob = UGLY!
Actually, the 1130 was the all-white version of the 1100 to take advantage of the "new" all-white appliance fad. The extra button is just as I suspected, for ash temp boost. Otherwise it is like the 1100 my sister had.