Yes, the Wollensak Series A is a Petzval and your Se Ro Co and Seneca is very likely a re-branded Wollensak Series A. It was VERY common in that era. Bausch and Lomb and Wollensak both did this a lot.
Swirls occur way out in the fringe area that was never meant to be used. A respectable portraitist 70 years ago would use a 16 inch petzval on a 5X7 plate and thus insure he was getting only the sweet center spot.
We on the other hand are a bunch of degenerates using petzvals too small for the medium in order to get swirlies on purpose