The coat is pure working cocker - the thinness, the feathering, the ears, and the colour - they can be this very pale gold/lemon. Possibly a bit leggy and thin of face for a cocker, but then some are thin of face. My WCS's half-sister's head is narrow like this and she's definitely 100% cocker, and they can go through an "all legs" phase adolescence. I would say it's at least mainly WCS.
A few people have asked what my 100% WCS is crossed with (guesses include flatcoat, red setter, Springer spaniel, and pointer) as people see something show-cocker-ish-but-different and assume a mix.
Working cockers are beautiful dogs, but I'm pretty biased :-)