SM U-135 [SEP] manufacturer
SM U-135
SM "U-135" was a German Type U 127 U-boat of the Imperial German Navy during World War I. 
History.
Built at the Kaiserliche Werft Danzig, the U-boat was laid down on 4 November 1916, launched on 8 September 1917 and commissioned 20 June 1918.
In November 1918, "U-135" was ordered to help put down the German Navy mutiny at Wilhelmshaven. Along with the 4th Torpedo Boat Half-Flotilla, "U-135" ended the mutiny aboard two German battleships
, SM U-21, SM U-22
- Type U 27: SM U-27, SM U-28, SM U-29, SM U-30
- Type U 43: SM U-43, SM U-44, SM U-45, SM U-46, SM U-47, SM U-48, SM U-49, SM U-50
- Type UE 1: SM U-73, SM U-74
- Type U 87: SM U-87, SM U-88, SM U-89, SM U-90, SM U-91, SM U-92
- Type U-127: SM U-135, SM U-136, SM U-137,