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| A poster giving the time-line of SIGINT during WWII; the submarine is U110, which was captured with its Enigma machine and codebook. | |
| Total images: 72 | Help | |
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| A poster giving the time-line of SIGINT during WWII; the submarine is U110, which was captured with its Enigma machine and codebook. | |
| Total images: 72 | Help | |