Quote: First, NMSEd thanks for being part of the discussions.
If this question has been answered, sorry, I don't recall seeing it. Why weren't the holes punched in the same fashion as the picture shown?
Because the holes were not flared in the 1st generation of the OEM Filter made for Chrysler, the holes were punched with flat edges. Only after the perforating tooling became dull and a burr started to appear on the punch down side was the change to the tooling made, and the flared hole iteration began.
What do you consider first generation ? O.E.M. from 1972,also have one in black from 1970.
Is there any marking or molding into the actual filter rubber to signify a production date/period of the filter that is in a box?
So your box copyrighted 1970 has a filter molded in black? Any indication a assembly line filter was molded black?
There's got to be period pictures of original oval air cleaners from when these cars were new?
What about pictures of these air cleaner in those Chrysler Training film strips?
