Dzhevetski drop collar type torpedo launcher on Russian submarine <a href="https://en.wikipedia.org/wiki/Russian_submarine_Akula_(1908)" class="extiw" title="en:Russian submarine Akula (1908)">en:Russian submarine Akula (1908)</a> (Note, wrong launch date of this submarine, in English version of this article)
Matrek, derivative work based on the picture uploaded by Неизвестен.
CC BY-SA 4.0
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