This entry consists of 93 objects manufactured by IBM, GE, Sylvania, and RCA. The 5965 is a dual triode packaged in a miniature glass envelope with nine pins. It is a digital-service grade similar to the 12AV7 medium-mu twin triode with lower gain. The tubes are marked with three groups of different numbers printed in white on the glass envelope. They are also marked with various colors of dots painted on the top of the tube near the tip. 77 have one orange dot and one white dot; 2 have an orange dot, a white dot, and a red ring painted around the tip; 1 has a white dot painted over the orange dot; 12 have a single white dot, and one has a white dot and two gray dots.