Hi Chance,
Part of the fun of this hobby is solving mysteries and identifying previously unknowns. I personally have many more unknown than known items.
I think in this case, it is still an unknown. it might be Piqua, or it might be CHF, or even maybe someone else made skillets using a skillet from one of these makers as a pattern.
You may get members willing to weigh in with an opinion, but if anyone says they know for sure, then they would need to prove it. Without proof, any guess is just that, a guess.
Jim stated his opinion, and mentioned that not all collectors agree with him. That may be as good as it gets. We have some wonderful, lively discussions about stuff like this on the member's only side, but at the end of the day, we usually agree to disagree.
I personally don't encourage these kind of discussions on the part of the forum that is open to the public, because it all is searchable with Google, and within a week, we start seeing stuff listed on EBay as whatever guess the seller decides to use. I think an "I don't know" is much better than a guess presented as a fact.
Knowledge is power, and misinformation is the enemy of knowledge.
Chris