No. 66 Squadron RAF
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No. 66 Squadron was a Royal Flying Corps and eventually Royal Air Force aircraft squadron. Wikipedia
Squadron Badge: A rattlesnake; The rattlesnake typifies aggressive spirit and striking power
Squadron Codes: RB (Sept 1938 – Sept 1939); LZ (Sept 1939 – 1945 and 1949–1951); HI (1946–1949)