Your bike is likely a 1956 model due to the graphics on the tank. The Radiobike was made from mid-1955-58. Total production was 8,500. In 1955, red, emerald, and blue were available. In 1955-early ‘56 red or green was available. 1956-58 was red only. 1957-58 the two speed was no longer available, leaving only the single speed.
I suggest you read up on my threads in the
“restoration tips” section for more info, original ads, and every some documentation on surviving bicycles.
Your written serial number shows a 1960 build date, which is impossible unless the frame got replaced under warranty. Would be so kind as to post a photo of the actual serial number?
@Dougiefresh