Vintage Vitra ??  

Vintage Vitra - i think!
Hi
i picked this up from a council collection 8 doors up in my street this week,
cant beleive it - ive searched half my life for one!
Im up for any info anyone can offer me about
its age and weather it is original and what its worth. All i can say is it has no labels, Vitra base, Brazillian Rosewood shells (so pre 1992), round cushion clips (so pre 1971), 3 screw holes in the armrests (so pre 1960) and i think feather cushions although the zippers are seized and i havnt opened them yet.
These chairs are very very! rare to find in Australia -
also planning to restore it to original spec myself and welcome any input
Many Thanks
Stewy