Dual C839RC 2-Head Cassette Deck. 1979Serial number: 020466Made in Germany Description and Review by Hi-Fi Engine: Copy and Paste Link below:http://www.hifiengine.com/manual_library/dual/c-839-rc Specifications Auto reverse, 2-head, cassette deck Track System: 4-track, 2-channel stereo Heads: 1 x record/playback, 2 x erase Tape Type: type I, FeCr, CrO2, Metal Noise Reduction: B Frequency Response: 30Hz to 20kHz (Metal tape) Signal to Noise Ratio: 67dB (Dolby B) Wow and Flutter: 0.03 Dimensions: 440 x 150 x 360mm Weight: Service Note (1): Serviced by Absolute Electronics of Toronto, Feb. 16, 2022. Mechanically working as intended. Deck is performing normally and recording is very clear and sharp.Service Note (2): Recently re-serviced by Klaasson Vintage Repairs of Orillia, Ontario, March 22, 2023. A glitch has been detected and it could not be repaired. The deck is not erasing a used tape with recorded music on it, in this ">" direction, but it will record beautifully on a new blank tape or "pre-erased" tape. It records perfectly in the opposite direction "