This Koala MMM whistle pez comes on a red 3.9 thin feet transition Yugoslavia stem. The transition stem is the earliest footed stem in which the back spine is not raised but the same depth as the front spine. No feet pez have a non-raised back spine, so the feet were added to the no feet molds in a transition to thin feet stems. Merry Music Makers are Pez with a whistle in the back of the head. Thes were first produced in the early 1980's and continued thru the early 1990's. Often called MMM for short, these make a great addition to any collection! Awesome addition - this vintage Koala MMM pez dispenser comes loose and ready to display!