I was lucky enough to find a Griswold 7 Dutch Oven with a button logo lid last week. The bottom is large logo, pattern 1277 and the lid is 1287. I'm trying to get a date range - just for my own information. I've read several threads here, as well as the information pages but haven't found anything other than one thread saying the button logo was "later"? Also, several references indicate the inside of the lid is enameled but mine does not seem to be? Any info would be appreciated. Thank you!!!