Terrific  example of U.S.Army Air corp hack set A-11. Movement is like new (black winding wheels)serial number T786830 which dates production to 1943. Ordinance ; U.S. Army A.C. ,watch navigation hack, Type A-11 ,Spec. no. 94-27834 B, Ser. no. AF44-28431  ,mfgrs. part no. 2114, Ord.no. W3o-053ac-1321  Elgin.Overall condition is very nice with original dial and factory hands. Case measures 31.6 x 39 mm overall and comes with  military olive drab   strap....ready to go!