I have what is quite possibly a 1950s BSR No. 8, 10 5/8 inch skillet that my mother gave to me back in '79 or '80 or so...may have been my grandmother's. Anyway, based on the information provided here, it is probably 1950s vintage. It looked old and well used. I used it occasionally and it was coated with years of layers of baked on burnt grease etc. Anyway, I cleaned it up recently using my self cleaning oven feature, which I later learned is not advised by some, but, nonetheless, it came out great and after seasoning, the bottom of pan had greenish tint in the sunlight and the inside of pan is very smooth. There was a lot of ash in the bottom of oven too. I hope my pics show well.