Tested and spins but no sound. Possibly tubes, but needs a revision Following the breakthrough introduction of the Nagra I the previous year, the Nagra II is an elaborate version of its predecessor. For the first time in Nagra history it features a level indicator with a needle that is the ancestor of the iconic « modulo meter », invented a few years later for the Nagra III. The Nagra II was very popular was part of every ambitious broadcast by recording companies around the world.