Vintage Akro Agate Black and White Swirl Marble

This is a vintage machine-made glass marble, likely an Akro Agate 'Opaque Swirl' or a similar pattern from the mid-20th century. The marble exhibits a deep monochromatic palette, featuring a solid jet-black glass base with contrasting opaque white glass swirls. The white ribbons are layered in a horizontal, somewhat chaotic banded pattern around the equator of the sphere. In terms of size, it appears to be a standard 'shooter' or slightly smaller, approximately 5/8 to 3/4 inches in diameter as scaled against the human hand. The surface shows a high-gloss vitreous luster, though close inspection reveals minor surface wear consistent with age and occasional play, including tiny pinprick 'fleabites' and faint surface scuffs. There are no large chips, cracks, or deep fractures visible. The internal glass shows good opacity with no significant transparency. The lack of distinct 'pontil marks' suggests a machine-made manufacturing process rather than a hand-gathered technique. This style was highly popular between the 1920s and 1950s, characterized by the 'corkscrew' or 'patch and ribbon' styles commonly associated with West Virginia glass manufacturers. The craftsmanship is typical of high-quality mass-produced American marble production from the Golden Age of marbles.