The Onzy Matthews is a nice listen. I've listened to that one quite a bit recently.
The earliest Select that I have with the 'pictorial' spine and top is Andrew Hill Solo, Mosaic Select No. 23. Not sure if any of the earler ones had this change also. Until you mentioned it, I hadn't noticed it.
Now spinning Dizzy Reece Select, CD 3 (the 'Comin' On' session with Turrentine). Very nice sound on the whole of the Carmel Jones set (it arrived this weekend). To be followed with Woody Herman Select, CD1.