Comparing: Tiger I L/56 vs. O-Ni

Development of the Tiger I was started in 1937 by the Henschel company. Mass production began in 1942, with a total of 1,354 vehicles manufactured. The tank first saw combat near Leningrad, and Tigers were at the forefront of battles from Tunisia to Kursk. Although production was discontinued in the summer of 1944, the Tiger I continued to see action until the end of the war.

A further development of the O-I with improved anti-tank guns. The military command's plan was to improve the earlier models and achieve a higher level of armor protection on the vehicle. Existed only in blueprints. No finished prototypes were built and the vehicle never saw action.