Can anyone tell me where to find more information about this radio, and whether it has any value to collectors?

Generally, radios like these have more intrinsic value than extrinsic. You can often pick them up on eBay from $25 to $50. Some models, like (Zenith) TransOceanics go for a little more, maybe $100 to $200. There are some collectables, older models and some novelties, that sell for more. But generally, the dollar amount they'll bring isn't real high. I think these old tube radios are great collectables, but more for the nostalgia than the dollar value.