This vintage blue twist glass marble is a rare find for collectors and enthusiasts of vintage toys. The machine-made glass and unique swirl design make it a one-of-a-kind addition to any collection. Its age level is suitable for children aged 12-16 years and adults aged 17 years and up. The marble's country/region of manufacture is unknown, but it is speculated to be from the 1970s to now. This is a great opportunity to add to your collection. This vintage marble is perfect for display or for use in games, and it is sure to be a conversation starter. 17mm diameter