Margie - 4 1/2 Yrs was discovered when this website was contacted by a purchaser on the West Coast! It actually is a set of plaster casting and bronze product both 9 inches high and 8 inches wide auctoned November 2015 by a company specializing in estate sales in San Jose, CA. (Plaster in foreground below)
Both have Steven A. Rebeck's characteristic signiture on the rear lower back:
The dating given is purely a guess noting other child busts were created in this era and that the
Tremaine Bust was likewise discovered on the West Coast.
The bronze version is screwed onto a wooden base and has the name plate above.
(Images used with permission of owner)