Led Zeppelin

In an interview for the Led Zeppelin Profiled radio promo CD (1990) Page said that the album took about 36 hours of studio time to create (including mixing), and stated that he knows this because of the amount charged on the studio bill.[26][43] Peter Grant claimed the album cost £1,750 to produce (including artwork).[21] By 1975, the album had grossed $7,000,000.[44] Led Zeppelin's album cover met an interesting protest when, at a 28 February 1970 gig in Copenhagen, the band were billed as "The Nobs" as the result of a threat of legal action from aristocrat Eva von Zeppelin (a relative of the creator of the Zeppelin aircraft), who, upon seeing the logo of the Hindenburg crashing in flames, threatened to have the show pulled off the air.[45]

In their first year, Led Zeppelin managed to complete four US and four UK concert tours, and also released their second album, entitled Led Zeppelin II.[29] Recorded almost entirely on the road at various North American recording studios, the second album was an even greater success than the first and reached the number one chart position in the US and the UK.[46] Here the band further developed ideas established on their debut album, creating a work which became even more widely acclaimed and arguably more influential.[47] It has been suggested that Led Zeppelin II largely wrote the blueprint for 1970s hard rock.[47]