In a press release just posted on VSC, it has been announced that Bill Gross, will swap his Inverted Jenny Plate Block (which he purchased through a Siegel auction a couple of weeks ago), for the famous 1c Z-Grill stamp owned by Donald Sundman, owner of Mystic Stamp Company. With this acquisition, Gross will be the only person in history to have compiled a complete collection of 19th century United States stamps. Click here to read the press release.