WW1 Armee de L'Air Observer Badge

WW1 / Interwar Armee de l'Air.  Distinctive badge with oak and laurel wreath border piece and half-winged star. Two-piece construction in what appears to be silver and gilt washed brass. Approx. 4 x 5cm (max). Brass lugs to rear for split pin type fastening. Unmarked. Wear to finish, otherwise good used condition. Rare badge. Stock code U19479.