This vintage porcelain sign from the Shamrock Oil and Gas Corporation features a classic shamrock design, symbolizing Irish luck and the gas and oil industry. Created in the 1960s in the United States, this green sign is a collectible advertising piece that would make a great addition to any vintage memorabilia collection. Perfect for those who appreciate classic Americana and the history of gas and oil companies, this sign captures a piece of American automotive culture and adds a touch of nostalgia to any space it is displayed in.