ID help on danish armchairs  

They look like JL Moller model 57 carvers
I've had unmarked ones before that were made for raymor USA - could be why they are not branded

While similar to the 57...
While similar to the 57 carver and 77 side chair, the 57 has a smooth chair back (without the contour detail seen above), and I have not seen one with a seat that is open at the back (sort of semi-floating) as in the OP photo. The side rails are also exposed wood, and I can't think of any Moller chairs that are like that.