RARE Transitional Pressing Pink Floyd Ummagumma UK Gatefold 2LP A2 B3 Prog Rock
The labels for Sides 1, 2 and 3 have "THE GRAMOPHONE CO" text, whereas the label for Side 4 says "EMI RECORDS". The colour of the Side 4 label is also slightly lighter in shade. I'm guessing that it dates from the early to mid 1970s.