The Raketa “Sonar Kashalot” is a limited edition of 500 pieces, an extension of the Raketa “Sonar” series. This exclusive model features a bezel made from the titanium of the nuclear-powered Akula Class submarine K-322 “Kashalot,” which was constructed in 1986 and later deconstructed at the Amur Shipbuilding Plant. The titanium was officially given to the Raketa Watch Factory. The “Sonar Kashalot” is part of a Collector set that includes a certificate of metal origin, an additional leather strap, and a 1:450 scale metal model of the submarine K-322 “Kashalot.”