My thoughts on this pan: Definitely Wagner. Possibly made in the Sidney Hollow Ware foundry. However, by the time this pan appeared (or any No.3's were made) I believe the Sidney Hollow Ware plant had been sold back to Phillip Smith. (Any relation, Dave?). More likely, I think, is that it is an unbranded Wagner made to compete with lesser quality pieces giving Wagner another area to compete in. You will notice the pan looks just like the branded Wagner one but with the WAGNER removed.
Note for Greg; can you PLEASE remove, or place at "attention" all those extremely annoying moving smilies that have recently appeared on the "post" page? I wouldn't be so rude to wave in your face when you were trying to type at the computer. I could sure use a little pleace and quite here while I am thinking and posting. Perhaps there is a way to get rid of them on MY computer only so all those who love them can still cohort with them.
Steve