The chairs are not in their original finish, but do have a nice old finish on them.
And that's just fine with us, as we think the mania for original finishes in the antiques world can become a bit of a rabbit hole.
Consulting the manufacturer's website, or a collector's site or book if the sofa is vintage or antique, can narrow things down a bit more.
A mass-produced sofa, even a pricey vintage piece, most likely bears a serial number somewhere on its body.
Our drawing room is the most elegant room in the house and retains its lovely, original neoclassical Federal moldings and plasterwork, which we have painstakingly restored.