German Type XXIII
Germany, Type XXIII (1943)
Germany, Type XXIII Training Stripes (1943)
Germany, Type XXIII Hai and Hecht (1963)
REVISED with DG_Alpha's shields
Feel free to comment and suggest corrections!
Notes: Depending on the drawing or photo there was quite a bit of variation in free-flood holes. Telling me the holes are wrong simply doesn't hold water.
Hai and Hecht: I'm not satisfied with the Hatches in the sail, they were not uniform port and starboard nor were they likely identical on the two boats. Good images are rare! If anyone has something good, I'd love to see them.
Primary source: Vom Original zum Modell: Uboottyp XXIII