Great pictures. Maybe you can add some pics of the profile of the spider with dimensions of its thickness. I believe those are thick shank wheels.
Thick shank were deemed to be overengineered and the second gen wheels are thin shank and don't need the shouldered lug nut. I haven't done any research to figure out when production changed over. Another refinement to the design is the redesign of the trim ring and wheel eliminating the need for the clips.
Somewhere along the line there was also gold anodized wheels, blue anodized wheels, and aluminum trim rings. My memory is sketchy but I think the aluminum ring didnt use the clip.
I don't think a thick shank wheel exists that doesn't use clips but interested to know if anyone else has seen the contrary.
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