Quote Originally Posted by Hinter View Post
In this photo, the radios they are using are around 1960 vintage:
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A bit later than that- but not much. The radios look like 27MHZ portable CB radios. I'd date them 65-70. Still a large radio to hang off one's belt. It's not until the mid-seventies and the CB radio craze that the smaller radios are created but they still need huge antennas ( because 27 MHZ).