12.25" wide with patent date of June 30, 1911. Front has art image of oxygen tank along with text "Cranes Oxygen Compound And Pure Oxygen Cranes Oxygen Works, 2 West 90th St. New York. We Are Not In The Oxygen Combination. The Best Is The Cheapest. Day And Night Service. Office Never Closed." Reverse side has photos of two cars including Packard along with text "Cranes Private Automobile Ambulance And Horse-Drawn Ambulance Service. Exterior: Private Limousine Car. Interior: Luxurious Invalid's Room". Text is a bit worn in center of reverse, otherwise VF. Interesting, perhaps the first actual commercial ambulance service.