Thanks Chris :)
There are many documented differences in Wapak pieces.
The why and how may never be known with any certainty.
It is my impression that Wapak was not very diligent with quality control nor with consistency of products over time.
The only Wapak Catalog that I have (circa 1912) shows a #7 with a
Bottom diameter of 81/4 inches. (and there is ambiguity how these skillets were marked... were they Indianheads? or Block Logo? )

Looking at your pics, both skillets appear to be genuine Wapak Indianhead #7 skillets, reasons for differences in actual size... may never be known.
