Interesting pieces of "trench art". Thanks for posting.
As a matter of interest, the springbok-head badge, approved in 1936, was one of the earliest formal RAF squadron badges, the current system of badges having been introduced only in 1935. The squadron acknowledged its South African ancestry by choosing the springbok head, and a motto in Afrikaans. At one time, evidently, the wording on the frame read 'Army Co-operation Squadron' rather than simply 'Squadron'.
http://www.griffon.clara.net/rafh/sqns.htm