Hi,
I know my question sounded weird, but I have an old case that is very similiar to yours that is round on the bottom and goes into an oval at the top (see pics). I believe mine is an old Brunswick made for the French market. The differences that I can see are that the configuration is different and the material is a different color in the interior, and the top on mine is held on by two latches instead of the one. Mine has the same "one foot" as yours and the handle and everything else seems the same. Yours might be an American Brunswick from the same time period? I have only seen a couple cases like this since I've collected cases. Mine is really roomy and holds the cue and shafts very securely, but without mashing them together... I wish I could have been more help!
Regards,
Steve