In contast to Ode, Apollon Musagete was a great success ... Diaghilev was also very well pleased with Balanchine’s choreography. It had some rather ugly patches; but on the whole it was very well composed and consistently interesting. The ballet had no proper story. Indeed it was described on the programme as a piece without a plot.
... It was a mere succession of dances which the birth of Apollo was perhaps the most effective. His mother Leto was seen standing on a rock, beneath which was a grotto, and from this Apollo emerged in swaddling bands, of which he was then divested by a pair of goddesses.
Here are some stills of the 1928 production from Gallica.fr. In the first Lifar is turning away from Terpsichore, in contrast to Jacques d'Amboise in the 1960 Radio-Canada film. Danilova is perfection.
& an unusual photo from the Apollo program of Balanchine on a rooftop - E.T.A. Hoffmannish - in Germany? Added: I just came across another still from the same photo shoot - it's from Triumph of Neptune.