I can’t find anything about a “Gigna” brand. I found an Audition with a similar pickup on Reverb. So maybe it’s a Teisco or a Guyatone.
I was planning to clean this and flip it, but it sounds so good that I might just keep it. For now it will be a restoration project. If anybody recognizes the tailpiece I’d love to know what kind of cover I need to look for.
Here’s a pic:
