Hello
shakin.
(El Dave just posted ahead ahead of me)
The El Degas guitars and basses from the early to mid 70's were top quality instruments. Many P-bass owner swear by their instruments, as do I with my Gibson 'Dove' clone. (For the benefit of those who don't already know, ED was primarily a Canadian distributed label in the 70's).
As to who made them, now there's the million dollar question! I tend to believe some of the MIJ Gibson models may have been made by Matsumoku, and others possibly Fuijigen. No one knows for sure and information we have is mostly speculation and deductive reasoning. Have a wander on over to
http://eldegas.com/forum/index.php and look around. you find a few P-bass owners there, and the site owner, Charles, is a very helpful guy.