It's been said this is the first electronic album performed entirely on electric guitar. And while Achim Reichel employed a similar tactic, his albums were group efforts. Gunther Schickert, another follower of this technique, also first released his landmark Samtvogel in 1974.
LP: 1974 Kosmische Musik
CD: 2004 Arcangelo (Japan)
Originals are housed in a single sleeved cover. My first LP copy came in the mid 1980s, at The Record Gallery in Dallas, on the Pop Import imprint. Over time I've bought and sold various editions including the original LP and the Japanese mini-LP as part of a box set that includes Ash Ra Tempel's first 2 albums as well.