According to IMDB, it was MacRae and Kathryn Grayson. My English teacher last year told me she saw the early version as a child (I'm Australian). The early version isn't seen in the US, because it was made before the Hays Code. Here's a clip from the early version: Song of the Brass Key- Marie Wells as Clementina and Roberto E. Guzman as Sid El Kar from 1929 The Desert Song http://www.youtube.com/watch?v=YPoqQdSeAXc