I always assumed because of the scarcity of the black label pressings the green label came in the sixties. Can anyone post sequence of stereo labels and dates?
I don't think Van Gelder's drum sound on the Blue Note dates has ever been equaled in jazz recording, partly because of the room they were recorded in, post 1959.. Reverb had to be added during mastering of Contemporary dates to make up for the small room early dates were recorded in.
To my ears the Contemporary sound became more" hifi "as time went on with extensive equalization being used on the drums for example, with midrange being notched down resulting in that airy sound on the cymbals.