For sale, the headphone shown in the picture is: Alpha Electronics Co., Ltd – Japan Model: SDH-8VW Stereo Headphone Approximate Specifications (based on its design and era) This is an old Japanese headphone from the studio/monitoring category, from the 70s to early 80s. Expected Specifications: • Type: Wired headphones (Over-Ear, Closed Back) • Driver: Dynamic Driver • Impedance: Likely between 8 to 32 ohms (some models from that period were 8 ohms) • Sensitivity: Approximately 95–100 dB • Frequency Range: Approximately 20Hz – 20kHz (may be slightly less in reality) • Volume Control: Integrated control knob on the earcup (visible in the picture) • Material: Thick faux leather ear pads + adjustable dual metal frame • Connection: Likely a large 6.3mm jack (common in old Hi-Fi equipment) Year of Manufacture No date is printed in the picture, but based on: • The thick brown leather design • The metal arms • The classic front plate design It was most likely manufactured between approximately 1975 – 1982. Is it considered rare? Alpha Electronics Company • Considered Vintage