YouTube. But in 1964 there was an earlier Oz production by a forerunner to CTC, The Moppet Players: Ozma of Oz.
This show was reviewed by Ruth Berman in a 1964 Baum Bugle, in the Oz Behind the Footlights section. I've always been intrigued as to what this production might have been like, and recently ran across photos on the CTC Alumni Archive blog. This is a blog featuring photos, sound clips and video clips from productions at the theater over the years.
According to Ruth's review, the show was very faithful to the book. From the photos, it appears that the Tin Woodman was left out of the story, and there is no sign of the Hungry Tiger or Cowardly Lion. The photo at the top of the page shows the Queen of Ev and her son, Tik-Tok, Dorothy, the Scarecrow, Ozma (in a strange choice of costume - all blue and black, including the poppies in her hair!), and Billina the hen.
There are more photos on the theater blog. The Children's Theater Company split away from The Moppet Players not long after this time, and the show is clearly simpler than the productions that CTC became known for. But it is fun to see documentation of this play!