Understanding a '468' Stamp on a White Gold/Silver Ring - Expert Insights

Question
Its got 468 stamped on it whats that mean

Answer
Hi Krissy ,
Sorry to say I have honestly never heard of such a number being stamped .
Its usually a sign of purity of the gold but
this one is a mystery .Im sorry Im of no use to you with this one .
Its a little outside of my expertise , but I tried to search it for you  in my compendiums .
best regards Rid