Of course, by the time I discovered and purchased Made in Japan — probably 1974 or 1975 — Deep Purple Mark II had already broken up.
Because things happened at supersonic speed in the world of Deep Purple, Ian Gillan had already resigned, which led to the sacking of Roger Glover while Made in Japan was still riding high in the charts.
So while there was a ton of new Deep Purple for me to discover in the mid-1970s, before 1973 had even ended, Gillan and Glover had been replaced by David Coverdale & Glenn Hughes. Who combined almost made up for about a quarter of the awesomeness of the guys they replaced.