Delfin drawing
Via ‘”Submarines of the Tsarist Navy” (Spassky, I. D., Semyonov, V. P., Polmar, Norman), an excellent English primer to early Russian subs. https://www.amazon.com/Submarines-Tsarist-Navy-Pictorial-History/dp/1557507716
laststandonzombieisland
Weapons, Wars, Preparation and Security from a recovering gun nut turned bad writer