Original equipment question

I'm sorting through a very nice 1965 Barracuda I bought a couple months ago. I wasn't able to look at it before purchase but so far it's meeting/exceeding my expectations.

It's a 273 auto floor shift car. It came to me with a rebuilt 273 supposedly upgraded to commando specs (it has the correct 4 barrel intake and a 500CFM edelbroack carb on it), and power steering. It also had an aftermarket brake booster with a single pot master hanging on the end of it. My question - how do I know if the car came with power brakes? It did have the fender mounted reservoir. I reverted back to manual - I'm used to that on my 64 Sport Fury. Thanks.