Oscar De La Renta - Signature 'O' hook closure?

[Nostalgia]

Hello all!

I was wondering if anyone could please provide some information on the clasp/closure below.
All of my research points to the 80s/90s, but I don't see anything on this specific/unique clasp.
The necklace closure is stamped/signed but there is no hang tag.
Thank you!

 

[anothertimevintageapparel]

The clasp design was from his Miss O line from the 80s.
I have a pair of unworn earrings from this line in the O design.

 

[Nostalgia]

The clasp design was from his Miss O line from the 80s.
I have a pair of unworn earrings from this line in the O design.

View attachment 169666

Thank you, that's super helpful!
Your earrings are classic.