A 1942 philco radio I picked up.

[Flying10uk]

As part of his electrical business my late grandfather use to recharge up radio batteries/accumulators for people because not everyone had electricity. I believe that these batteries/accumulators were a dangerously high voltage.

http://www.vintageradio.info/cell.html

1942 (June 1941) - Philco Radio Gallery

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[IanS]

The mention of accumulators took me back to the fifties when I used to help a pal deliver charged accumulators and collect the discharged.. This was done using a delivery pushbike. It was surprising the number of these old radios that were still being used, these had a band called trawler band where they could listen to the local fishing boat radio traffic.