Hi! First time poster here - but I recently bought a vintage Yves Saint Laurent Rive Gauche suit jacket. I thought I was getting the pants along with the suit, but it's just the suit jacket. Any tips/help on ID'ing the potential season/year of this jacket? I don't understand this jacket label and what the numbers/letters mean. Trying to find the pants to match this and it has a pinstriped pattern. Probably a fools errand, but thought I would ask on here.