It's an early Passion bass, I have seen a fretted version with the same pickup config. As far as I know, serial numbers aren't logged on these very early models, but if you speak directly to Patrice Vigier, he will be able to help you some more. I think this bass would be built around 1984. The fretted version may or may not have had a brass leminate between the neck and fingerboard, but being Delta Metal, yours probably wont.
Nice looking bass - let us know what Patrice says!
Cheers
ped