The picture below shows larger front and back views of this 1936 Child Actress Shirley Temple Doll Advertising Premium CelluloidPinBackButton. It is marked on the two sides as follows:
THE WORLD’S DARLING GENUINE SHIRLEY TEMPLE DOLL IDEAL NOVELTY & TOY CO. RE. U.S. PAT. OFF. HER SIGNATURE MADE IN U.S.A. CELLOMET PRODUCTS CO. N.Y.C.
The doll advertising pinbackbutton measures about 1-1/4'' wide. It appears to be in good condition with an indent in the center, and some water spotting on the edge as pictured.