Does anybody know if revere ware manufactured a "pre-1968", 9 inch skillet/fry pan… Which I believe would be identified by a double ring on the bottom and two screws in the handle? I see plenty of 9 inch skillets for sale… But none that might be indicative of the features of the pre-1968 production… Can anybody answer this question? Maybe I'm spending a lot of time looking for specifics that don't exist?