Nursery Cryme is hailed a milestone of progressive rock, but it was a difficult production then. The first Genesis album with Steve Hackett and Phil Collins has achieved cult status among the fans.
The album was released in 1971 at a time when Genesis were still far from being a big name in the scene. Accordingly, it is difficult to prove the specific release date.
Genesis - Release date research: Nursery Cryme - report
Nursery Cryme was the album that made Genesis a force to reckon with in the progressive rock genre. Despite a lack of success it is considered a classic. We analyze why.
Genesis - Nursery Cryme - CD review

The 1973 Classic, remastered on CD in 2008.
Review available

Turn It On Again - The Hits brings all "short" milestones onto one double-album.