Portable, miniature - "The Marvel Vest Pocket Set" in original cardboard box. One earpiece only with crystal inside and aerial lead and clip (constitutes the complete set). The outside of the earpiece is black bakelite on one side and chrome coloured metal on the other. The box is white with black text.
Crystal radio sets were the earliest form of radio receiver and used particular crystals both to power the radio and to convert radio wave signals so that they could be listened to. As the sets didn’t need batteries to power them and were quite simple to make, they were able to be small, like this Marvel Vest Pocket Set. Crystal radios didn’t produce a loud sound, and the earpiece in this set that provides a convenient and personal listening experience was actually an essential part of most crystal radio sets.
Midget Radiophone Reg. Pat. Pend. Inscribed
Midget Radiophone Reg. U.S. Pat. Off. Pat. Pend. The Marvel Vest Pocket Set Midget Radiophone Co. Chicago, Illinois The Greatest Radio Sensation in the World Printed
The Marvel Vest Pocket Radio, No Tubes - No Batteries - No Up-keep or Expense. Carry your Radio in your pocket. Printed
Midget Radiophone/ Reg/ Pat Pend Engraved
Midget Radiophone Company. Radio, 1978.381. The Museum of Transport and Technology (MOTAT).