Thank you so much, David, for sharing your outstanding knowledge.
For those who are interested I'd like to add some DD bezel types with additional gems involved.
18378:
https://www.christies.com/en/lot/lot-6446765
A diamond bezel with little ruby baguettes at 3,6,9,12.
This (maybe also with sapphires or emeralds) seems to be the only authentic configuration for this type, e.g. I don't think pyramids on 3,6,9,12 is a genuine setting.
18178:
https://www.rolexforums.com/showthread.php?t=740953
Alternating ruby-emerald-sapphire bezel as shown in the thread above.
18058 and 18059:
https://www.phillips.com/detail/rolex/CH080221/114
https://www.sothebys.com/en/buy/auct...locale=zh-Hant
Rainbow bezel.
18168:
https://davideparmegiani.ch/watch/rolex-18168-3/
https://davideparmegiani.ch/watch/rolex-18168/
Sapphire and ruby baguette bezel (like the diamond baguettes shown by David)
18148:
https://amsterdamvintagewatches.com/...mel-carrousel/
Alternating sapphire and diamond bezel. Rubies or emeralds in this configuration are unknown to me.
18388:
https://davideparmegiani.ch/watch/rolex-18388/
Carré ruby bezel. Idk if sapphire or emerald version exists.
Feel free to add bezel types I forgot or to add corrections.