Continuing through the "W" box, first with West Coast Refining, Inc., Napa, CA. A short-lived company that was registered with the State of California between 1980 and 1983.
W.S.C., Wescan and Western States Refining, Fontana CA.
World Mint Corporation in the two varieties I have seen to date. Public records show company activity in Phoenix, AZ in the early 1970's
And finally for this post, Yellow Daisy Refining Company, another Arizona company. 5 oz class examples are extremely rare as most that surface are of greater weight, 10 oz plus.