Rarely mentioned on here but did not escape Arthur Frommer's attention when compiling his 1964 NYC guidebook. 366 Madison Avenue.
In fact, to be fair, I don't think Paul Stuart has really had a fair look-in on here. Again, mentioned by Frommer. I own nothing now but can vouch for their rainwear and cords (pleated, mind you). Their knitwear - less so, for the price. But, for anyone interested in a slightly more relaxed 'Euro-American' style (Vetra? Weston loafers?), Paul Stuart might be worth checking out on Ebay Com.