The product is an early 20th-century M.F. Christensen Orange Slag Glass Marble, measuring approximately .63 inches in diameter. This vintage marble, made in the United States during the golden age of marbles, features a slag style design and originates from the renowned M.F. Christensen and Son Company. As a highly collectible item this unique marble showcases the craftsmanship and style of machine-made marbles from that era.