The Revox Symbol B MK II is a vintage reel-to-reel tape recorder that was manufactured by Revox, a Swiss audio equipment company. It was introduced as an improved version of the original Symbol B model. The MK II model offered better performance and additional features, such as improved signal-to-noise ratio, balanced inputs and outputs, and adjustable bias control. It was widely used in professional recording studios and by audio enthusiasts for high-quality audio recording and playback.