This fishie is a "book piece"--meaning he made it into print. Calvaire was a high end manufacturer and many Calvaire pieces are hard to find, especially this fish that appeared in a popular jewelry book. It measures 4" by 3", is signed and marked sterling, and is in excellent condition. Quite a looker. It was from the age of "jelly bellies", but I know not if Calvaire ever made a series.