I had enough time to properly clean up two of the three cast iron skillets. I was able to identify that the 8 inch skillet was a wagner ware skillet. When I was seasoning the bottom of the pan a tiny little W and some other characters of the logo started to appear.

As for the griddle it cleaned up alright however the logo is practically rusted off and I can't really identify it. There's a lot of pitting rust on the cooking surface and I have been having trouble getting it take seasoning, I think I might have polished it to much that there is no ridges for it to stick to. The only areas that seem to be taking the seasoning are the rust pits. I will keep trying.

I suspect the logo was here

Size or model number?

Bottom profile of the griddle

Pits on the cooking surface.

As for the 8 inch skillet it cooks good. I seasoned it 3 times and it's doing just fine. Here's a photo of the logo coming through.

Oh and for the lead testing they all tested negative. I will update this post when I get the other one in good working order.