the one with the damaged conning tower is U-46 ... and the other is U-47
U-46 got involved on a series of actions where he could got the damage you can read about it in the link below
http://www.uboat.net/boats/u46.htm
this boat served in the following Flotillas
2 Nov, 1938 - 31 Aug, 1939
7. Flottille (front boat)
1 Sep, 1939 - 31 Dec, 1939
7. Flottille (front boat)
1 Jan, 1940 - 1 Sep, 1941
7. Flottille (front boat)
2 Sep, 1941 - 31 Mar, 1942
26. Flottille (training)
1 Apr, 1942 - 1 Jul, 1942
24. Flottille (training)
1 Sep, 1942 - 1 Oct, 1943
24. Flottille (training)
the symbol from the 7. Flotille
the symbol from the 26 Flotille
the symbols from the 24 Flotille
ALSO I RECOMEND YOU GUYS TO READ THIS STORY
its fictional and its based on SHIII , and by far one of
the best i have read so far so ... it goes like this
U-46 is a type VIIC with 7th Flotilla out of Kiel, it's August 1940, and this is our 9th patrol. We have the Happy Swordfish painted on our conning tower, the lads swear it brings us luck....
http://laughingswordfish.net/