In my mind, WV Swirls are vintage marbles, which were intentionally made as swirls at a WV company. I would not consider JABOs to be WV swirls any more than I would consider CAC or the occasional Akro or MK swirls to be WV swirls. But that's just me . . .
Flower time-lapses are awesome. A whole field would be cool. No fields of flowers around here. But I do love walking about this time of year. it's nice to look out over mowed hay, and drying bean and corn fields.
It's a nice marble, if the base glass under the white is mostly clear, I would lean Vitro - seams look it too. But the glass is pretty bubbly and I do see what could be sloppy flip-flopped ribbons so Pelt might be a possibility - haven't seen a Kokomo like it.
I agree, it sort of depends on what they mean by "durability" though. The Mohs Hardness of agate is about 36% greater than glass, but that's just "scratchability". Anyone care to look into pressure loading characteristics? lol.
Does the name "Ringer" refer more to the game and the box the marbles were packaged in, rather than the marbles themselves? Did all Ringer boxes have the same type of marbles?