NEW YORK – An 18K gold and diamond Penelope Double C pin by Cartier, a pair of 18K gold and diamond earrings by Jean Schlumberger for Tiffany & Co., and an 18K gold and diamond Van Cleef & Arpels Ludo Swann wristwatch are among the treasures fighting for top-lot status at Jasper52’s Designer Jewelry, Watches, and Bags auction. It will be held Friday, April 21, starting at 8 pm Eastern time. Absentee and Internet live bidding will be available through LiveAuctioneers.