That's a 1935 Hamley Low Model A Formfitter. No, it hasn't been sitting in a box since then: my uncle Harvey Faulkner had it built back then, and I had Hamley's rebuild it in 1990. I'll get a higher resolution shot up soon, but for now, take a look at the seat and cantle angles. This is a 13-in tree, and fits me with two-finger's space between the front of my thigh and the back of the swells.