The color and pattern is what makes me think that. I have quite a few that were dug at Pennsboro and this style is one of the types that I have most of from there. Some marbles were made at more than one site, so you can't always pin them down to one factory site or another. These just match so well with the ones I have from Pennsboro that I feel like they are from there.
The Sistersville marbles were made from a longer stream of glass with richer better colors and high quality glass. As time went on, it became necessary to use cheaper glass, faster glass stream (shorter, less pattern) to increase production and cut costs so the Pennsboro ones can vary. The ones from St. Marys were cheaper yet, faster made, and less pattern. The common single color ribbon on a plain white base ones from there are pretty blah and I think that's what they were mass producing before they closed their doors.