Crown Lynn made seven different sizes in these jugs, six standard sizes and the tiny one with the number 1621. Here is a pic of a new range of hotel ware in July 1968, from a Crown Lynn newsletter.
Hotel jugs were scarcely new when this new range was released. Here is one decorated in an ivy leaf transfer, almost certainly from the late 1940s or early 1950s. It is trimmed in gold and was obviously meant for household rather than institutional use.
These jugs also turn up with Frank Carpay's hand-painted decorations - now THAT would be a find! This one is much more prosaic - made for the NZ Army, with a special 'NZG' backstamp.
Here are some of my hotel jugs. The plain one at the back is the largest. The jug with the red lines is an older style hospital jug. This red-lined ware was phased out and replaced by ware with the beige decoration introduced in 1978 - see the jug bottom right.
Take care till then.