“I purchased these prior to 1980 (I think) and have had them in storage for around 25 years. They still work perfectly. I don't have any serious equipment anymore so it seems a shame to have them sitting doing nothing. I remember that they cost £100. ( a lot of money in those days: around 1/2 weeks wages). I may put them on eBay soon. ” --CCHRISTOF
High-end offering from German headhpone company 'Manta' (manufactured by Calrad Imports Inc.*) in 1974. *Reference Needed Impedance Rating in Ohms 4.0 minimum and 16.0 maximum Frequency Response Range Hz 30.0 to 15000.0 Headset Cord Length 84.0 inches nominal Earphone Element Type Dynamic Earphone Cushion Material ...