I managed to score a vintage 30ml bottle of Eau Sauvage with the same box as pictured above the Basenotes description.
Nothing too exciting or unique - just a quality, classic buttery-smooth citrus with a touch of herbs to give it a "natural" feel. Eau Sauvage is a fragrance for genuine men with genuine personalities that can see through all the bullsh*t. The kind of guy you can count on.
What's nice about the vintage Eau Sauvage, besides the noticable oakmoss in the base, is the fact that it lasts all day. The vintage version is a little mustier and dirtier than the current version, but I love it just the same; Edmond Roudnitska took the classic Eau and gave it a jawline with stubble. Hell, even John Lennon wore Eau Sauvage.
Really, any formulation of Eau Sauvage is good, but I think it's the vintage that has that little extra "something".