Patrick,
Your No.8 pan sounds like it may be a later Wagner. The "V" on the bottom is probably just a pattern letter denoting which of several patterns was used to cast your particular pan. These letters are of no collector consequence. The No.3 pan I can't tell. Photos might help if you can post them here.
C.B.,
I have thought that "extra finished" was not the grinding on the cooking or inside of Griswold's pans but was just their overall better casting and finishing. Their 1890-91 catalog mentions "extra finished" on everything that is ground on the inside. But pieces that are left "as cast" are marked "extra smooth light casting". Guess I have to almost agree with your thinking after doing this little bit of research. So maybe "extra finished" does refer to the grinding. Whatta ya know?
Steve
I have to backpedal here. Looked at Griswold's Catalog No.45 c.1915. In addition to all pages of iron which is polished on the inside being labeled "extra finished", so are all the pages for tea kettle, gem pans, long griddle, bundt pan, and others. These piece have no polishing. I think the jury still has to reach a verdict as I just don't know EXACTLY what "extra finished" refers to.
Steve