This is a Louis XV style pattern. I don’t know the name.
Unlike US manufactureres in the nineteenth century, French makers did not make a vast array of patterns, and didn’t give them fanciful names. Usually they just called them by the period the pattern was meant to evoke. Thus every manufacturer had at least one Louis XV style pattern in their catalogue (the most popular), an Empire style pattern, Renaissance, etc., and called them that, sometimes with a number.
A reprint of O&C catalogue pages I have has two Louis XV style patterns - alas not this one - each called Louis XV and a number.
Sorry can’t be more help; maybe someone with a complete O&C catalogue can tell you more. Good luck in your ongoing research.