To add to Jeff's fine dissertation, note that there is a difference between Jason's and Steve's filters in the "Diamond Mesh" construction. Look closely at the mesh diagonal angle and type of construction. Also, on Jason's the overlap is vertical while on Steve's the overlap matches the diagonal of the mesh at a true 45 degrees.
As has been said, with the lid on, Steve's would pass scrutiny as a '67 version while Jason's would not.
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