It could be a Juzek, but it would likely have the import label that was attached in NY. It could also be any number of German shop basses including Wilfer (who made many of the Juzeks), Roth, Hofner. If you can find another bass with the exact same Blum, that may tell you something. I have one of these unlabeled basses and my luthier thinks it's a Roth, early 20th century by the way the purfling and curve to the edge were set.
To give you an idea of how random this can be, my other bass has a Juzek label but it doesn't look like any other "Juzek" I've seen. But it does look like a "Rauner" labelled bass I saw a pic of. Rauners were evidently imported to the west coast. I think of my bass as a Wilfer, for lack of any more specific info.