no i`m not 100% sure which funky funky twist came first blue or green,only that all the other green releases from 508 to 513 all look the same,, i do know the `55` series is before the 50/51 series all issued in 1970.....the 50/51 releases are 1971 & 1972....whats even stranger is why they would use the blue label and put a different mix as a b side..as i said earlier first taste came as an `A` side originally in 1970 with i`m havin so much fun on the flip....the blue and green first tastes have the same matrix (1005) which is odd as really it should be different..........bloody hell it is confusing isnt it..looking at it now the blue release could be after all the green releases possibly from late 1972 and regurgitated as an `A` side and gatur on a budget couldnt be arsed to change the label info .....i think the label went into mothballs again after that for a while