“ […] extrapolated from the letters in the Iron Maiden logo […] I later discovered that same font [Busk] was used in 1976 for the poster for David Bowie film, The Man who Fell to Earth as well as on a real estate paperback book cover from 1979. With these extra resources I was able to piece together a better representation of this font.” — Typodermic

See Metal Lord for the revised version released in 2012.