Janette,
on pge 53 of Guy Warners book, Army Aviation in Ulster there is a picture of XV136 just about to lift from Lisenelly Bks, Omagh in 1976. It looks like a 651 cab because of the Maid of Warsaw (but 654 did have them as well) just between the doors and is in the old green/brown cam, I am sure later it would have been darkened to a green/black. If you can't get hold of a copy of the picture I will try an scan it on my next turnover in the UK.