Sadly I haven't tried anything from the directory listed as being launched in 1968. If I look a couple of years either side of that I'd have to say Equipage (1970) or Eau Sauvage (1966).
My current top 10 (subject to change) in no particular order:
Rive Gauche Pour Homme, Serge Lutens Cuir Mauresque, Armani Prive' Nuances,
Armani Prive' Bois d'Encens, Ermenegildo Zegna Indonesian Oud, Essenza de Zegna, Amouage Beloved Man, Fahrenheit Le Parfum, Dior La Collection Couturier Vetiver, and Rasikh Syed Junaid Alam.