Similar facial features, exact color schemes, delicate arms, each girl with a distinct item, and gold ruffled trim - all these characteristics shared between these two sets of shakers make this the "start" of a newly recognized "old" series.
The "start" because where there are two, there are usually more. Furthermore, the set on the right both have 2 pour holes, leading to the possibility that they are mismatched singles that each have their own separate mate.
"Old" because they have the older blue version of the Enesco Japan Import paper label and the vintage gold ruffled trim that is frequently seen on older styles of Christmas Santa sets. Circa 1950s.