Begin with an elegant diamond charm bracelet. A Baltimore actress brings her signed Andy Warhol poster. Next, a “Tramp Art” picture frame fashioned from cigar boxes. Our appraisers rave: rare protection papers for a free black seaman and a working steam engine. Close with a 1820s Kentucky pistol. Highlight: Appraiser Lyman Speckheuer advises how to safeguard valuable documents.