U.S. ARMY, COMPASS, M2 (NONMAINTAINABLE) Serial No.135291 ,WILLIAM AINSWORTH & SONS, INC. 美國陸軍，M2羅盤，序號：135291，愛因斯沃斯公司《Black Water Museum...

WWII, U.S. NAVY Bureau of Aeronautics Wrist Compass by Waltham watch Co. 二戰，美國海軍，航空局，表式羅盤，沃爾瑟姆鐘錶公司《Black Water Museum Collections | 黑水博物館館藏》

PRELIMINARY INSTRUCTIONS FOR RADIO COMPASS SCR-269-G, Manufactured by BENDIX RADIO, DIVISION OF BENDIX AVIATION CORPORATION BALTIMORE,...

WWII German Luftwaffe OCULUS G.M.B.H. SPEZIALFABR. OPT. APPARATE BERLIN-N4 NO.676 Compass 二戰，德國空軍，OCULUS高精度測量用羅盤，序號：676號《Black Water...