Walters guide says they were produced with nickel plating from 1898-1984. I think the notched rectangle logo was first used in about 1925
I looked thru some catalog's and the 1914 has a rounded logo and the 34 has the notched type. But, also saw one with a square cornered logo. And, my handle measures 6 1/16" and the catalog's for the 10" model have 6 1/8 & 6 1/4".
If all the info was in one spot it would make it nice, but also boring.
I found prices on these from 15 - 92 dollars, sure glad mine was $4.