I did a lot of hunting for this awhile back. I can't say if it's vintage, but it's certainly not the "concentre" version. There's a store near me that has 3 different bottle types of the non-concentre version, each slightly different. Very confusing to me.
That I can tell Mike, Chanel still makes the non-concentre version, but it's only sold in Europe. It can be "dug up" from time to time in small perfume stores, cologne carts, etc. Some online vendors likely sell it too, but so many vendors/SAs do not make the distiinction between this and the concentre version, I never really trust them, even if they show the squared bottle on their website.
I wouldn't worry about what you paid. That's a good price for Chanel Pour Monsieur. The perfume store near me that carries it sells for like $90 knowing that it's hard to find (though they will haggle on price a bit).
Hope someone really familiar weighs in.
I'd personally love to know why this version isn't sold in US anymore. Last round of PM threads related to this, I seem to recall the conclusion was this version is still sold in Europe.