It was decommissioned in 1995, but a step inside this Foxtrot B-39 (U 475) Russian submarine is enough to send you back to the Cold War. This Soviet submarine would spend weeks submerged with a full contingent of men crammed into the steel tube. Read more about it and see plenty of pictures at Environmental Graffiti. Link
(Image credit: Foantje)
but perhaps e it is just a training torpedo...
Everything else is just finest steampunk...