LOOKS TO BE AN UNUSED EXAMPLE. MARKS FROM STORAGE, REQUIRES A GOOD CLEAN.

THE BC645 WAS DEVELOPED TO PROVIDE IFF FUNCTIONALITY ON ALLIED AIRCRAFT.

IT CAN BE FOUND INSTALLED ON AIRCRAFT LIKE THE B17 FLYING FORTRESS, B24 LIBERATOR, P51 MUSTANG AND ETC.

IT WAS ALSO USED BY THE RAF, BUT THIS MODEL WAS MANUFACTURED FOR THE US ARMY AIR CORPS.

ITEM IS UNTESTED, SOLD AS IS, THE ONE SHOWN IS THE ONE YOU WILL BE SENT.

ANY QUESTIONS PLEASE ASK.