Embossed on one side"Coca-Cola-Trade Mark Registered-Bottle pat'd Dec 25 1923". On the opposite side of the bottle is embossed Coca-Cola - Trade Mark Registered - Min Contents 6 Fl Oz. The glass is incredibly clear with bubbles in the glass confirming the age of the bottle.
Do not mistake this bottle with the reproduction circa 2000. The original bottle has thicker glass, heavier in weight, and has bubbles in the clear glass.