CHRISTOFLE ACIER NAPKIN RINGS

Found this pair of CHRISTOFLE STAINLESS STEEL NAPKIN RINGS this morning in a thrift shop,paid less than a $1 for the pair,the design is unusual and both have a sea serpent with stars above the body stamp.I tried to look it up to no avail,this make is quiet famous for fine dining cutlery and table accessories,any info regarding this design would be appreciated.
logo reads CHRISTOFLE ACIER.