The Antique Replica Drink Dr. Pepper Safety First Sidewalk Marker takes us back in time. The maker measure approximately three and a half inches in diameter. The marker is constructed of brass and given an antique look. The back of the marker has the name of the original company who made them in 1933, National Safety Marker Co. Pontiac, Michigan. Also the marker features the patent date on the back of 4-11-33. This would make an excellent item for the collector to add to their collection.