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technics, sound tape units, advertising for magnetic tape unit "BG 20 Smaragd" in magazine, GDR, 1956 Stock Photo - Alamy
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technics, sound tape units, magnetic tape unit KB 100, made by VEb Fernmeldewerk Leipzig, GDR, 1957, historic, historical, 20th century, East-Germany, East Germany, DDR, sound, audio technic, home electronics, 1950s, 50s, design
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