A Gamage's crystal set, with enclosed detector and condenser and six-stud switch in mahogany case, circa 1921 , a Brown H1 speaker base with a papier-mâché straight neck horn and a pair of Ericsson headphones (3)
A Gamage's crystal set, with enclosed detector and condenser and six-stud switch in mahogany case, circa 1921 , a Brown H1 speaker base with a papier-mâché straight neck horn and a pair of Ericsson headphones (3)
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.jpg "Source: Christie's")
.jpg "Source: Christie's")
