OAKLAND, CA.- The difficulty for connoisseurs to hone their eye for art-level 19th century Oriental rugs goes beyond their limited availability at individual galleries. The periodic international auctions invariably mix a few collectible carpets with dozens of pedestrian pieces. As a result, there are few venues to view premier examples of the artistry from “The Second Golden Age of Weaving.” Enter Claremont Rug Company, a gallery founded in 1980 whose entire inventory of more than 3000 pieces is devoted to art and investment carpets from this period. “Many of our clients,” said Claremont president and founder Jan David Winitz, “have told us over the years that they treated our Gallery and, more recently, our website as a ‘museum’ where they could see rare carpets of superlative artistry and contemplate their majesty.” But once rugs were acquired by other collectors, they were remov