Lemania 1872 SAAF. Note: no inner bezel and no 861 sweephand. The AF number on the picture you posted above is also out of sequence. Its caseback is also incorrect
We know the Lemania Chronograph issued for the Swedish Army, we less know that South African Air Force specimen, from circa 1970 Credit picture: Analog And Shift. This case looks familiar to us, as it is the same than the Breguet Type XX from the same era...