Really nice all original Bulova A-17. Movement is a Caliber 10BNCH hack set, 15 jewels, just serviced and running perfect. Ordinance Info: Watch Navig. Type A-17A, Spec. Mil-W-6433A, Mfr. Bulova Part No. 10BNCH, Mfr. Bulova Serial No 11975 Order No. DA-36-038-ORD.20328  Stock No. 8TAA-993000-24 and U.S. Property. Case measures 32mm x 39.5mm and comes with replacement canvas band. Just serviced and running perfect.