Having grown up in NJ (although, I attended the not-Ivy, quite-pedestrian Rutgers University), I was in that store in the '80s. What can't come through in the ads - or the ads for J.Press, which also felt as I will describe - is the vibe or atmosphere of these stores.
Today, almost all men's clothing stores feel "salesy," with some very high-end ones feeling aloof or snooty. But these traditional Ivy stores felt neither - they felt more like an old comfortable men's club that had decided to run a clothing store on the side.
I've never been a member of an old men's club, but for business and as a guest of friends, I have been in many of them. Almost all of them project a similar aura: old money, old-school, traditional values, a bit worn at the edges (almost saying: "we could afford to spruce up, but why?") and a familiarity between customers and staff that comes from not only long-time relationships, but generational relationships ("I fit your dad in his first suit"). Even the air smelled different - like old wool or something.