Hello Rainer .

It's Right , i'ts more possibly the U-872 , in condition if the picture was really taken at Bremen . If we see in detail , we look a snorkel with the first position in the start of the coning tower .I don't know when the U-872 was fitted .
The U-873 had the same type of snorkel but U-874 and U-875 were fitted with a snorkel in the second position : in start of the two 20mn platform-gun.
Perhaps U-876 had the same snorkel , i'm not sure !

Well , nobody find the opposite side of the U-875 ?
And in the picture posted by Antonio at the top , that is the submarine in centre ?
Some indications to help you : this is a submarine with a deck not transformed ,
she has a first typ of snorkel , and a first typ of the house of the compass !
She's not the U-883 because the U-883 had the second typ of snorkel and also the second typ of the house of the compass !
At the right of the picture , we can see a submarine with these caracteristic , but she don't have the last safety's storage at the end of the "wintergarden" as the U-874 and U-875 . This is the U-883 ? Possible but she had the same equipment as
U-874 and U-875 ( U-875 had a 37mn gun on his deck before the conning tower ).
I think is the U-516 , a typ IXc with the deck transformed and the second typ of snorkel !
This is a good trivial pic , no ?

Bye .

P.S that is the color of the U-874 ? White or Light Grey ?