This bass is serial number 002 from 1990 and only 7 Vigier Arpege 6 strings were made on that year (please check this information in the link attached below).
http://188.130.104.14/sites/medias/pdf/12.pdf
This is a great bass (Arpege is the top model from Vigier) from the best series ever made from Vigier (the series III which is neck-through and not bolt-on, like it's now Vigier series IV) and in 6 strings which are not avalaible in their catalogue now.
If have you ever dreamed with a bass that no needs truss-rod adjustment, with a neck that is stiff under humidity changes and with independent eq controls (bass, mid and treble) on each pickup, you've got it here at a very nice price. It is impossible to find another bass that cut in the mix as much as this bass does for this price.
Very good luck with the sale.