The Christensen Agate Co Multi Color Swirl Marble is a vintage machine-made marble from the United States, manufactured before 1970. This distinctive marble features a swirl pattern in multiple colors, making it a unique and collectible piece for enthusiasts of marbles. With its near-mint condition and brand history, this marble is sure to be a prized addition to any collection of vintage marbles. Awesome marble, one of my first CAC marbles. Sad to let it go.