This is what you get after entering clues. The example is a smooth-bottomed No. 8 skillet with a small cross logo in block letters, the wording GRISWOLD / ERIE, PA., U.S.A. and the number 704.
Most likely: Griswold — Small block logo
The clues you gave agree with this reference and nothing contradicts it. Check the evidence below against your pan.
The clues you gave (7)
All wording on the base: GRISWOLD / ERIE, PA., U.S.A. / 704
Logo shape: cross inside a double circle
Lettering of the maker name: upright block letters
Logo size compared with the base: small: a modest mark
Lettering of the maker name: upright block letters
Logo size compared with the base: small: a modest mark
Raised ring on the base: none: smooth, flat base
Longer number elsewhere on the base: 704
A smaller, lighter logo without CAST IRON SKILLET. Smooth bottom, except sizes 12 and up, which kept a heat ring. Handles changed twice in this period (early, late, and late grooved).
Easily confused: The large block logo is bolder and fills more of the base.