The one far left is definitely Peltier Peerless patch in the classic light blue with yellow patch. The middle one's looking very much like a Peltier Peerless Patch. The one on the right is looking like a Vitro Conqueror to me.
It does appear to be a roll mark. We don't really know if it's a cold roll or not because cold rolls only occur when the rollers are just starting up and are actually cold. This could easily have occurred at any time during a production run.
Thanks, i know, isn't it amazing???!! It was in a 220 mixed lot that I bought and was one of the reasons I bought the lot, cuz it was tiny in the photo!!!
Hoping to help clarify some short-sentence confusion. 😀 Officially, a marble has to be 1/2, one half inch or smaller to be called a Peewee. 0.44 is less than 1/2 in (.50), so therefore that marble is a Peewee. I love Peewees!!