I have a Topps 1980 Jeff King 454 with an all yellow back. It was at one time listed by Lemke in the SCD Catalog but I believe he removed it from latter editions....maybe after he read Dylan's Junk Wax Gems section arguing it does not belong in such catalogs
. I don't know how many copies exist but am happy to have one
https://junkwaxgems.wordpress.com/20...the-big-books/