Vintage square skillet

[Glenn.Riling]

Asking for help once again. Recently I bought a square 9 1/2" x 9 1/2" cast iron skillet that required a lot of cleaning. I did not see any markings until I completed the cleaning. Only then did I see that on the bottom of the handle that there appears to be a "4" with an "R" below it as shown in the attached photo. Until I saw this I was guessing it was an old unmarked Lodge. Based on some discussions online I now think it could be something else. Does anyone know for certain what I got for my $15.99 purchase?

 

[Doug D.]

I'd assume unmarked Wagner.

 

[Glenn.Riling]

That is what I was thinking. I will probably do a bit more digging. Thanks for your response.