Recordings by 'Challenge Do Schubert'

Here is a discography of 2 phonograph recordings by "Challenge Do Schubert" :

That Certain Party - CHALLENGE (1920s by Sears) - 603 - ; matrix: 6968; control: 636; ~3 min
Tonight You Belong To Me - CHALLENGE (1920s by Sears) - 603 - ; matrix: 6976=1; control: 629; ~3 min