Man, that PS1 proto is really something different than the retail controller. Besides the start, select button shape, and the "plus sign shape" where the X, O, Square, and Triangle buttons should be, I really see nothing that resemebles what the retail controller ended up being.
It really is a cool controller. On another note, those darn glossy sidecars collect so much dirt and grime.
Beautiful shots of those controllers! Thanks for the comparison psx shot. They are closer in size than I'd thought.