Tricky. It's Asia or Mexico.
That base is fairly clear. Nearly crystal clear. Maybe a tinge of gray but no bottle green.
A clear base either suggests "early" Asia or modern Mexico. "Early" Asia increases the likelihood of them being from Japan.
Would be good to see the marbles from the top so I could see all the vanes and how crisp they are.
I'm so much on the fence, that I probably need to get my cats out and see just how crystal clear the Mexican bases are compared to these (because I remember them as being very clear).
And Ann has answered while I was dithering. *loading her answer*. Yes, I like her answer.