[size=12]The p/n 780 was just for the next size down, the No. 2 Scotch Bowl. Common types of markings and text should date to about the same production time. If it's slant logo and just the word "ERIE" without the "PA, USA," then I would guess 1910's or 1920's.
Unless they changed dimensions, features, or casting methods, they didn't usually change a pattern number just because a logo marking changed. For example, the very common #8 skillet was always a p/n 704 from the late 1800s right through to 1957, even through all the logo and handle changes (except for the period when they were using several consecutive p/ns for the earliest flush HR ERIE skillets.)[/size]
