JOC Carlson Sweden, pair of leather cube armchairs, the back and seat cushions are detachable held in position by Velcro strips.
The metal legs are also detachable, they screw into metal threaded sockets and are very solid an sturdy.
I believe them to be late seventies early eighties. the Leather is in good order with some scuffing consistent with age.
Measurements; approx. 74 cm square 43 cm height to seat 65 cm height to arm