Sony DC Type I - 1974-1976 US

Sony DC Type I Blank Dictation Cassette Tape - 1974-1976 US Sony DC Overview The Sony DC (1974-1976 US) is one of Sony's earliest blank dictation cassette tapes produced for the American professional market. Dating from the mid-1970s, the DC uses a standard gamma ferric oxide normal bias formulation optimized for voice frequency recording in professional dictation and transcription equipment of the era. An exceptionally rare survivor from the cassette format's formative years. New sealed NOS condition. Technical Specifications Tape Type: IEC Type I (Normal Bias) Bias EQ: 120 microseconds Formulation: Gamma ferric oxide Application: Voice dictation / transcription Market: United States Year: 1974-1976 Condition: New sealed NOS Key Features Historical Rarity: Produced in the mid-1970s when the cassette format was still establishing itself in professional markets, making this an exceptionally rare piece of audio history. Sony Provenance: Manufactured by Sony during the company's pivotal early cassette era, reflecting the build quality standards of the period. New Sealed Survival: A factory-sealed example from 1974-1976 is an extraordinary find for vintage tape collectors and media historians. FAQ Q: What condition is this tape in? A: New sealed NOS from 1974-1976. Free US shipping on orders $50+. Ultra Ferric. Q: Is this suitable for recording? A: While functional, this tape is primarily of collector and historical interest given its age and rarity.