I've just had a look at my photo's and I remember now. The one on U-535 is actually unusual in so far as it is one of the rare two barrelled versions.
The four barelled one was the more common and was fitted to later u-boats.
[ATTACH]14733.IPB[/ATTACH]
[ATTACH]14734.IPB[/ATTACH]
The four barelled one was the more common and was fitted to later u-boats.
[ATTACH]14733.IPB[/ATTACH]
[ATTACH]14734.IPB[/ATTACH]
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