Are these 1973 Topps uncut card sheets a home run 𝘢𝘯𝘥 a slam dunk? "Maryland Zoo, Hour 2" premieres Monday, April 21 at 8/7c on PBS and the PBS app. #antiquesroadshow #appraisal #topps #toppscards #baseball #basketball #newepisode #baltimore #maryland #marylandzoo #zoo #BaltimoreMaryland #sportscards