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British naval hero (1920–2016) who led Operation Primrose in May 1941, a successful effort to capture German submarine U-110 with an intact Enigma machine and a wealth of signals intelligence, leading to the Allied breakthrough into cracking the German naval Enigma code. Cardstock 8.25 x 11.75 photo of the British naval officer on the bridge of HMS Bulldog, signed in the lower border in blue ballpoint, "Sub Lt. David E. Balme, HMS Bulldog, 9th May 1941, Recovered Enigma Coding Machine from U110." In very fine condition.
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