know the stamp, but few have seen the Plate-Number Block... A trade of the two world's most valuable items by weight would be historic, fun, and make a great story for stamp collectors everywhere. Despite this, I turned down the offer because of my enjoyment of possessing the Z Grill and because I had committed to lending the stamp to the Smithsonian National Postal Museum starting in June 2006. When told of my decision, Mr. Shreve's client generously offered to honor my commitment to lend the Z Grill to the NPM. It was then that I agreed to the trade. Today, I'm thrilled to have been able to trade our 1¢ Z Grill for the Jenny Plate-Number Block. As a boyhood collector, the Jenny Invert was one of the rare stamps I fantasized of owning. With this trade, those fantasies became fact and I had the special privilege of owning the two best and most valuable United States philatelic objects. At the trade itself I experienced a positive feeling of excitement, almost an electric sensation... I'm proud of the positive attention the trade brought to philately."In 2014, Mystic sold the Jenny Invert Plate-Number Block to famed shoe designer Stuart Weitzman for about $5 million. Confederate Printing Press No. 3 During the American Civil War, the printing firm Hoyer & Ludwig was chosen to produce the first Confederate postage stamps. The hand-press known as No. 3 was used to print the stamps using lithography. To print, a lithographic stone was placed on the bed of the printer, moistened with water, inked, and covered with paper. The stone was then run through the press and past a blade, which pressed the stamp images onto the paper. Hoyer & Ludwig went out of business at the end of the Civil War, selling out to Simons & Keiningham, who later sold their equipment to A. Hoen & Company – including Press. No. 3. After a fire destroyed their headquarters, Hudson P. Hoen gave the press to former Hoyer & Ludwig apprentice (and Confederate stamp expert) August Dietz. Confederate Press No. 3 remained in Dietz's family long after his 1963 death. It was displayed at the Dietz Printing Company for several years and even loaned to the Smithsonian Museum of American History, VAPEX 1975, and the APS Stamp Show in Richmond, Virginia. Over 100 years after Dietz acquired Press No. 3, his heirs put it