In 39 there were few type VIIs and the IIs were the standard as the U-flotillas were not being funded very much because Hitler had a big hard on for battleships which absorbed most of the naval budget. So in 39 a II was a very likely assignment. By 40 or 41 the VII was more common and the standard. But it's all up to your choosing. If you really want no choice in the matter just join the Wolves at War and get a number and type assigned to you.
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