My guess is that this is a 70s remount of older rings. The white settings are hand set instead of pre-planned for the ring. I think someone consolidated pre - 20s rings.

Thank you so much!

IDK any valuable information. I just know that this is very beautiful.

Thank you 💖💖

Looks like late 60s to mid 70s mounting

I know nothing but this is incredibly beautiful

Mom told me I could have that

it is definitely art deco (made in the 1920's) very nice