1.25” with Bastian paper first used 1907. Slogan is “Duck Back Shoe/Sheds Water Like A Ducks Back.” Small marks on the blue sky above the duck appear to be simulations of marsh grasses while at lower right 3 white lines against the red bkg. are under the cello as printed. Button is Exc. and displays Mint as made. Hake book Collectible Pin-Back Buttons photo example Shoes Section #225. Comes with Hake’s COA.