Hitachi stereo receiver model SR-903. This stereo was sold in 1977. Rated at 55 watts per channel at 8 ohms. Features, High and low filters, FM muting on/off, loudness on/off, stereo/mono switch, adaptor on/off, two tape monitors, one phono input, one aux input, tape copy 1 to 2 and 2 to 1 selectors, separate, treble, mid, and bass controls, also has both tuning and signal meters.