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Hi B,
I believe the 70 production line trim rings have:
One of the 4 clips aligned with the hole for the valve stem.
The steel band the 4 clips are fastened to is flat.
The 4 clips are spot welded to the band.
The ring is polished stainless steel and flash chrome plated.
I don't think the 68-72 ring used in production was ever available as a service part.
Regards,
Alan