patented 1907, nickel-plated, with wide trumpet fitted with gauze and bearing plaque and stamped '10597', complete with coil, mounting brackets, and rubber bulb, approximately 175cm long overall.
patented 1907, nickel-plated, with wide trumpet fitted with gauze and bearing plaque and stamped '10597', complete with coil, mounting brackets, and rubber bulb, approximately 175cm long overall.
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.jpg "Source: Christie's")
.jpg "Source: Christie's")
