This antique Christensen marble is a true gem for collectors. Handmade and dating back to the pre-1970 era, this transitional opaque white ground ponytail marble is a rare find. Its exquisite corkscrew style and age-appropriate for 4-7 to 17 years and up make it an excellent addition to any toy or hobby collection. Its brand and type, Christensen, are highly regarded in the industry and ensure its authenticity. Don't miss out on this beautiful piece of history.