Hi Poppy,
Nice looking tom! shine 'er up nice and you'll have a beauty there...
What you're looking at is "faded sky blue pearl". 40 years and maybe some cigarette smoke from bars or wherever does a number on the blue pigment that was once there. The reference to the "Ringo " kit is simply in brand of drum. Ringo played a Ludwig "Black Oyster Pearl" which is a striated finish.
I have a date stamped '63 Ludwig Jazzfest (snare that often accompanied the set your tom comes from) (pic) that was sky blue pearl and has faded to the same color you have there. No harm in that, just adds to the vintage appeal, character and history of the drum. I have a 13" Ludwig Black Diamond Pearl tom from the same era and it remains black! See the pic with the two wraps stacked together for comparison. Mallet Player2