I have many of these bottles.Embossed on one side/front of bottle,NOT TO BE REFILLED, (6) FULL FL.-OZ,in circle on neck.On back of bottle,NO DEPOSIT*NO RETURN, (6) FULL FL. OZ, in circle on neck.PEPSI=COLA embossed in slug on back & front of bottle.Crown top.I don't think a ND is the same as a NDNR? I think the NDNR started out in the 1940's. long story but mostly to compete with the compettion of the Beer Can. LEON.