from which year could this be ???
I would tend to agree. The Chanel for Men bottle could be from even a decade before (1970's). Pour Monsieur - later...80's - 90's.
Here is a good place to look at the historical perspective - http://www.basenotes.net/t/328678/chanel-a-gentlemans-cologne-a-revised-history
I have Vintage 'For Men' Cologne and After Shave. Really nice juice! The recent Pour Monsieur that is light green in color - nice, but not the depth of Vintage. Still, quality juice though.