[Kapitain Oliver Leinkraunt]

Don’t want to sound like a spammer, but talking about u-boat interiors, you should take a look and maybe write to the admin of Instagram page u_boat_history, which is focused only in ww1 crafts and has many intresting u-boat interior pics, some from Ms types, some from the U-140 and I think some from u-12 or u-17. (many of them, impossible to find on internet; Infact I think he took them, directly from archives).