Somebody might have swapped the ROM's later on to upgrade it to II+ . There are non plus machines around with rev.4 board. So basicly it's up to the ROM's what it have.

What color of the power supply it had? Golden i think i saw there. Can be either one. Early Rev.0 Apple II's had usually the metallic/silver power supply.

It looks like Apple used any parts in hand when assembling machines in early days. There's strange combinations around.