LP: 1981 REM
CD: 2002 Musea (France)
Netherworld has always been a collectible private press from the US. I sold mine when the CD came out. This isn't one of Musea's best reissues, missing the full biography that is normally associated with the label. But sonically it's fantastic and includes a very important bonus track as noted above.
January 2017 update: And I've reclaimed the original vinyl, obtaining a sealed one in a trade with a friend.