1st Complete Wall Telephone Set by
»L. M. Ericsson«, 1880
Marked: "Patent L. M. Ericsson & Co., Stockholm".
With helical microphone.
Extraordinarily rare, produced for one year only!
Estimate: 6,000/8,000
US$ 8,000/11,000
Reserve: 4,000/US$ 5,400
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