I'd been after a decent copy of the original UK issue of "Eldorado" [K56090] for some time to replace my own long lost copy, until last weekend when I was fortunate to locate a near mint copy at the ELO Beatles Forever [ELOBF] recommended Vinyl & Vintage in Wolverhampton. As usual, when I got it home, I gave it a good clean and then discovered something rather unusual.
Cherry Blossom Clinic web site - to see if the same markings were to be found on his copy and he confirmed the same and also that his copy of the UK Warner Bros. copy of "On The Third Day" [K56021] had no such issues.
This suggests that at least some editions of "Eldorado" could have been UA pressings re-labelled with the Warner Bros. famed 'Burbank' label for the UK market. A similar thing happened with "Four Light Years" [JETBX2] - as detailed in this ELOBF article. Hence, once again, when it comes to collecting [and re-collecting!] ELO and related vinyl, you never know what "Discovery" you are going to make!
Until next "Time" in the ELO [and related] Universe ... KJS ... 02-Jan-2016