I don’t think I would call a green on tan base a game marble, even when weak. I know of Heatons, Ravens, and JABOs with similar colors. Alley might be a possibility too. Ine of those makers likely
I bet I can help you with a list. If you can give me your email I would be happy to send you a Word document I wrote that includes all the known marble making sessions at JABO, SMM, and DAS. There’s some more details in it too.
The fun hunt for euro sparklers is finding ones with both aventurine and oxblood in the same marble. They are out there, but not common at all and borderline hard to find/rare.
Oxblood on the interior looks the same as on the exterior. Easy to see in these examples. I have plenty of euro sparklers with what I think of as oxblood