To get more information, you could try:
* Searching for the film on online movie databases: Check websites like IMDb, AllMovie, and TCM. Sometimes, these databases have information about less known films.
* Contacting film archives or libraries: Organizations like the Library of Congress or local film archives might have information about the film or its cast.
Please keep in mind that if the film is truly obscure, it might be difficult to find any information about its cast.