Harmonia - Documents 75
I think this the 'bonus' LP in the box set.
2 studio tracks previously unreleased are great but it's the 2 live cuts from Hamburg with Moebius, Roedelius, Rother and Neumeier that is the real meat of this release: Stunning musicianship and astounding SQ for a 41 year old love recording (a first gen copy of the band's recording given to Asmus Tietchens).