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It's also 12 characters shorter.
Let me guess: you ran this through an LLM, and have posted the resulting hallucination as an undisclaimed fact.
Well it's obviously not that.
The M3 was the 1934 design. In 1942, the German Navy replaced the M3 with the M4, which was incompatible with the M3. This message was sent in May 1945, just days before the end of the war.
Is this a ChatGPT delusion? Please don't do that here.