Most people new to the hobby want to ID every item that they find, and choose from among the half dozen or so major makers. If it wasn't Lodge, BSR, Griswold, then it MUST be Wagner , right?
There were dozens and dozens of other makers out there. Some are less well known, and most of the unmarked items will probably never be identified.
Most of the items in my collection fall into the unknown category. Many items should just be appreciated for what they are, not who made them. Some of my Favorite skillets are unknowns.
Chris