Sandy, don't know if you saw this, but a guy on the R-390 list just bought this radio on eBay for $760. The listing said "Stewart Warner" and there was just a fuzzy pic.
When he got the radio and started unwrapping the bubble wrap, it became quickly apparent that what he had was a brand-new, never used, 1968 EAC.
Take a look at these pics:
http://www.wa3key.com/r390a/