It has what is known as the Pelt flip-flop.
The 2nd white, hidden up in that top right corner, may look like it is on what I am calling "Side 1" but I'm guessing if I got to see the marble up close I would be convinced it actually was on Side 2.
I figured they probably all had decent glow. But the brightest one is so bright the camera doesn't pick up the light from the other. I sold quite a few fluorescent marbles for awhile and I got pretty good at finding which colors and light levels might camera would pick up. I'd sell bright lots and sorta bright lots and medium bright lots. Some of blue glowers or multicolor glowers look quite nice on their own but they get drowned out by the strong vaseline glass.
Now I feel embarrassed telling a Pelt guru that I'm sure it's a Pelt if he isn't.
Chuck, why do you doubt that it's a Pelt? Or were you playing with us?
Looks like you have some Aces in there. The kind Akro called Aces. Not the ones called Aces now. They're probably the least interesting ones to most, but I have a fondness for them.