United States. Four Air Force Navigator/Observer Badges (Now Called Combat Systems Officer Badge) United Republic of oxidation evident on one plate

oxidation evident on one plate

Green felt base with four twisted aluminium chords with single green band

black paper backer exhibits wear exposing the aluminum bullion wire

insignia and cross

United States. Four Air Force Navigator/Observer Badges (Now Called Combat Systems Officer Badge) United Republic of oxidation evident on one plateBasic Badge (in silver filled metal, maker marked "ANTAYA G. I." and marked "1 20 SILVER FILLED" on the reverse, measuring 76. 5 mm (w) x 25 mm (h), dual push pins); Senior Badge (in silver filled metal, marked "1 20 SILVER FILLED KREW G I" on the reverse, measuring 76. 2 mm (w) x 33 mm (h), dual push pins); Master Badge (in silver filled metal, marked "1 20 SILVER FILLED KREW G I" on the reverse, measuring 76. 3 mm (w) x 36. 3 mm (h), dual push