Thanks, Eric, for the tip of the composer's name and the operetta in which the song appeared!
A few minutes with Google and Wikipedia turned up the following website,
www.halhkmusic.com/pinklady.html, at which some enterprising soul has made MIDI re-creations of many turn-of-the-century operettas, including "The Pink Lady." Further rummaging around in Act II located the MIDI version of the song in question!
As a result, I now know that the number is called "The Kiss Waltz." Hopefully this will result in my obtaining the sheet music shortly. BTW, I also discovered another song, also titled "The Kiss Waltz," but it was written in 1930 by Joe Burke, published by Witmark, and the melody is completely different.
Thanks again for helping to solve an interesting mystery!! SETH
"Novelty is always welcome, but talking pictures are just a fad." -- Irving Thalberg