Souvenir Stick Pins

The Clearco Souvenir Stick Pins sold for $1 USD and were from the mines where the Clearco Radio Crystals were mined in Idaho Springs, Colorado.  These were made from ores mined there, and most likely contained a chip of steel galena crystal.

These were probably sold to generate interest in their primary sales of steel galena crystals, used in radio crystal detectors, and advertised as "The Clearco Radio Crystal" "The World's Best Radio Crystal".

Hier finden Sie 1 Modelle, davon 1 mit Bildern und 0 mit Schaltbildern.
Alle gelisteten Radios usw. von Clearco Radio & Equipment Co., The; Idaho Springs, CO