Horseshoe Cage Cat's Eye in Root Beer Colored Glass Gladding V?

This is an unusual horseshoe cage cat's eye with white vanes in a dark root beer colored glass. Some images were backlit to help see into the glass. The only company that made horseshoe cage cat's eyes was Gladding Vitro, but they are not known to have made cat's eyes in root beer colored glass. This marble appears to be a rarity and not listed elsewhere. Under a loop it has a few flea bites and tiny sparkles, so we grade it Mint-.