Article Photos: At Home: In appraising antiques, old does not equal valuable

Gary Sullivan, left, a featured appraiser on PBSâs âAntiques Roadshow,â specializes in high-end, American antiques and clocks. Here he talks with a guest about an Isaac Jackson Tall Case Clock, circa 1760. Photo courtesy of WGBH by Jeff Dunn

Gary Sullivan, left, a featured appraiser on PBS’s “Antiques Roadshow,” specializes in high-end, American antiques and clocks. Here he talks with a guest about an Isaac Jackson Tall Case Clock, circa 1760. Photo courtesy of WGBH by Jeff Dunn