Good condition stirrup harness made by Enterprise UK. Unusually for a stirrup this one has a reserve container on the front so can be used by someone who likes the simplicity of a stirrup but wants the safety of a reserve.
Would suit 5ft 6" - 5ft 10" medium build. I'm 6ft and tried it and whilst the stirrup adjusts long enough for me, the apron is too short so doesn't support my upper legs sufficiently.