Deep Purple in Rock , brilliant album
But (imo) their masterpiece is "Machine Head" , never mind that it's got the legendary "Smoke on the Water" , wrap yer ears around "Lazy" and "Highway Star"
Both top albums, woof.
I've still got them on Vinyl and they kick the CD recordings in the teeth.
Listen to them on the black stuff mate...... always sounds better and brings back memories of a misspent youth.