Nice Floor!
I have seen and repaired just about everything out there but this one is a first for me. I've seen 5/16" thick planks built out of 1" strips, which I thought looked strange. It appears to me, looking at the picture, that the floor was made of three individual 2&1/4" strips which are 3/4" thick. It's possible that they side beveled the outside strips after the flooring was laid, along with the butt ends where the plugs are. The reason I say this is because on the end butts, I can see where the grain of one "end" continues into the next plank, leading me to believe the butt end bevels were added after the floor was laid. It's also possible that this cosmetic work was done quite abit later after the floor had been laid originally. Originally a standard 3/4" x 2&1/4" strip floor. Then someone wanted to change the appearence to a plank floor. Or this could have been the plan all along. Either way, I think this was the way it was done. The plugs are probably real but I've seen them faked in with stain, ink or a branding iron. As far as repairing the floor, the way I'd tackle it it to do it EXACTLY the same way as it was done originally. A close examination by a very experienced craftsman (such as myself
) would reveal the way the floor was constructed. Don't allow some BOZO in there who doesn't know how to restore historic floors. Find the BEST hardwood flooring guy in your area and have him take a look. You have a real nice floor! With a little work, it can be made into a showpeice.