Hosman,
Yeah, its virtually impossible to authenticate old objects with photo's alone, it's one of those is what it is kinda deals. To check out why this is, look at video in "Questions about maker of federal card table" in this forum and you'll see why personal inspection is really the only way to evaluate old objects.
It's the same for your doors as it is for almost any object. This is why, if one is not familar or cant examine in person, trust in what seller says is really all thats left, which is not ideal unless its a seller you trust.