I'm just curios to what the radio is worth! I bought it at a garage sale today and would like to see if I can make it work! Anyways does anybody have an idea its worth? 675a Coronado 1938 or 1939 farm radio! Still has serial number and sticker inside box. Thank you.

There are several things that determine a radio's "worth": condition, rarity, features, manufacturer, case type, and so on. Your set was, when new, an inexpensive battery-operated broadcast-band only set. It is worth what you paid for it, provided you didn't pay more than $20!

Like any used item, "provenance" is also a big factor in determining its worth. For example a Civil War-era pocket watch might be worth four or five hundred dollars just on its own merits; but if the same watch could be proven to have been owned by some significant historical figure, its market value might increase by several times. Provenance is more difficult to establish for mundane items like radios- but it is not unheard of, just like any other personal possession.

I have misplaced my main value guide - and the other ones I have don't list that radio. There are probably folks that really go for farm radios - but the complication of a vibrator (to generate B+) may not appeal to others. Farm radios had their heyday before rural electrification, when wind chargers were used to charge DC batteries.

Coronado sets were sold in Gambles' store, a chain of stores in rural areas, selling small appliances, hardware, fish hooks, etc. Gambles' competitors included Coast to Coast and maybe Montgomery Ward, at least for small appliances and hardware. Their radios wouldn't have been considered primo when new, but now who knows?