I'm not sure what you are implying with this statement other than to extend the possibility for there to be more opportunity for gold cased C cases to exist?
But, to answer your query, yes I know that there are multiple references for C-shape Constellations. (and multiple variations within those references)
In this context, we are discussing those that come in the 168.008-168.029 bracket - i.e. mid 60s to early 70s. (but you can throw in the .0056 & .0057 if you must)
And I stand by my statement that white gold C-case constellations (I didn't mention bracelets) are significantly more common than any other earlier or contemporary constellation reference.
Note, I didn't say that they were common but certainly have been more common in recent years than other references.