Sony - TC-K51 2-Head Single Stereo Audio-cassette deck

The Sony TC K51 is a beautiful vintage cassette deck from 1980, loved for its reliability and classic appearance. Equipped with a wear-resistant Sendust & Ferrite (S&F) head and a stable FG servo motor, this deck delivers a very constant and musical analog playback. At the front, the large illuminated VU meter and the LED peak indicators immediately catch the eye. Thanks to the option for four types of magnetic tapes, including the then-new metal tapes, and Dolby B noise reduction, you get the most out of every cassette

Specifications:
Noise Reduction: Dolby B Noise Reduction
Frequency Response: 30 Hz – 15,000 Hz
Wow and Flutter: 0.045% WRMS

The Sony works perfectly.
For a better impression see photos