Hmmm... welcome to floor chat: (kiddn')
The wood is fir and was found under two layers of carpet in the farm house we live in, built in 1941. We did some repairs and found a second layer of the same lumber under it. Dont you wish they still made them like that today? My wife wanted to finish them herself so she rented a drum sander and put a light stain on it. Not bad for a girl eh?