Enigma M4 cipher machine from the wreck of the German minesweeper R 15 near Umag - Gaspari, Andrej (Annales. Series historia et sociologia, 2023)
Keywords: Adriatic; Archaeological remains; arheološke najdbe; Cipher machine; Enigma M4; Istra; Istria; Jadransko morje; Kriegsmarine; lahki minolovec R 15, 6. Räumbootsflotille; Minesweeper R 15, 6. Räumbootsflotille; nemška vojna mornarica; Second World War; svetovna vojna 1939-1945; šifrirni stroj