UPDATE, 12 / 2001: Well, here's a thought from James Stanicek, and I wholly concur with it (and as for the unspecified mfr date, my best guess is c.1961/'62):
"RE: the round magnets on the bottom of your Seminole 1001: You don't give the date for the radio, but I am betting that automobiles had metal dashboards at that time, and it is very likely that the radio could be "stuck" up on top to give you music as you drove down the road ! Maybe a poor guess, and I certainly would not advise forgetting to take it down from there before leaving the car, or that plastic would look like a melted lump in a very short time!"