The Uher SG 521 is an antique wire recorder manufactured by the former Czechoslovakian company, Uher. Released in the 1950s, it was one of the earliest commercially available wire recorders, a technology which allowed for audio to be recorded onto a magnetic wire instead of onto a physical medium like vinyl or tape.The SG 521 featured a reel-to-reel design, with two reels that held the wire or magnetic tape media. The user could record or playback by switching between two modes using a control knob. The device also had a microphone input and a line input for connecting external audio sources, as well as a headphone output for monitoring.The wire recorder technology was popular in the early days of audio recording, but fell out of favor with the advent of tape and digital recording technology. The Uher SG 521 is now a collector's item, with its vintage charm and historical significance as a precursor to modern recording technology.