Rank insignia of Admiral of the fleet of the Soviet Navy
https://ru.wikipedia.org/wiki/%D0%90%D0%B4%D0%BC%D0%B8%D1%80%D0%B0%D0%BB_%D1%84%D0%BB%D0%BE%D1%82%D0%B0_(%D0%A1%D0%A1%D0%A1%D0%A0)#/media/%D0%A4%D0%B0%D0%B9%D0%BB:RAF_N_F9AdmirFleet_1962-94_Vertical.svg