Wagner Ware question

Today I went to a few estate sales and the pickings were pretty slim. However, I did buy an old iron skillet and was wondering how to find out about it.
It's 10 or 11 inches across and is deep with a squared off bottom, not rounded edges. On the bottom is stamped WAGNER WARE, under that is the word SIDNEY and under that is -O-, down further is the number 1059.
It's really a fine old skillet, nicely seasoned, and worth the $10 to me that I paid for it. I plan on using it, don't care if it's collectable, just wondering about it's provenance.
It's 10 or 11 inches across and is deep with a squared off bottom, not rounded edges. On the bottom is stamped WAGNER WARE, under that is the word SIDNEY and under that is -O-, down further is the number 1059.
It's really a fine old skillet, nicely seasoned, and worth the $10 to me that I paid for it. I plan on using it, don't care if it's collectable, just wondering about it's provenance.
