SONY Super Metal Master cassette tape, C-46SMMST model, 70μs EQ specification, unused. - Model: C-46SMMST - Type: Super Metal Master - Manufacturer: SONY - EQ: 70μs - Condition: NEW Unfortunately, the packaging film is not present, but it is unused. There are no missing accessories. There are inconspicuous scratches on the case. Please check the photos. SONY Super Metal Master was a cassette tape released by Sony in September 1993. The cassette tape in the image is "Super Metal Master 46," and the model number is "C-46SMMST." The recording time is 46 minutes round trip, approximately 23 minutes per side. This cassette tape is known as a high-end model in the metal position (TYPE IV) and features a ceramic half (case) and a metal case. Thank you for viewing.