An early applied mouth wax sealer quart in a strong light cobalt blue color. Embossed on the front in an arch: "STANDARD", and on the reverse heel: "W McC & Co". Also on the reverse side is a peened-out: "MASTODON" that is still easily visible. Excellent condition with no damage or stains. There is a tiny shallow (match-head size) flake on the outer ring in back. Base: crossed lines. Made by Wm McCully & Co of Pittsburgh, PA.

est 1500-3000