I don't know how many of each pressing got to The UK. But, in USA, back when the record was out, and into the early 1970s (up till 1972 ), I saw many, many more of the Grand Junction issue. Both the Black Rock, and the Epic issues were rare. The Grand Junction was fairly commoln. My "coverage" was mostly in Chicago, Detroit, L.A., San Diego, San Francisco/Oakland, Portland (Oregon), Seattle, Vancouver B.C. Indianapolis, Milwaukee, St. Louis, Kansas City. it was lesser so in the Northeastern cities, Canadian cities and NO coverage in Southern USA.