Large Binoculars with Case (possibly Wartime/Army ) (Barton OX3)

These old very large binoculars are offered as seen - they measure 28cm long and 9 cm across the widest part. I think some lens parts? are missing - I am including some I have found but not sure if they fit these particular binoculars. The case is missing its strap as well. I have seen some like these advertised online as from wartime/army items - I think they orginally belonged to my father-in-law so this is possible. Someone may have the means to get these into good order.