US WWII AAF 3″ P.B. STERLING “PILOTS WING” WITH 95% SILVER WASH FINISH, HM’ED STERLING, UNISSUED ON “PX” CARD

US WWII ARMY SIGNAL CORPS “FREQUENCY METER BC-221-J”, DATED 1942, MANUFACTURED BY ZENITH RADIO CORP., SERIAL #58, THE RANGE OF INSTURMENT IS FROM 125 TO 20,000 KILOCYCLES, THE 10″ X 12 ��” X 9 ��” BLACK METAL CASE RETAINS 90% OF THE BLACK CRACKLE FINISH. THE CONDITION OF CASE AND DIALS ARE G/G+ ONLY WITH SOME CORROSION,