A very attractive badge here, commemorating the 30 year jubilee of the Submarine Division of the Northern Fleet, 1961-1991. Nice multicolored hot glass enamel and multi-piece construction, working pin and catch on the reverse. 
 
In its modern iteration, the Arctic Ocean Flotilla of the former Imperial Navy evolved into a full fleet of the Soviet Navy in 1933 as the Northern Flotilla. After being awarded the Order of the Red Banner in 1965, it was officially known as the Red Banner Northern Fleet. During the Soviet era the Northern Fleet operated more than 200 submarines, ranging from diesel-electric to nuclear-powered ballistic missile classes.