1918 $100 Stock Transfer Stamp, green, horizontal overprint, perf 12
1883 4c Jackson, blue green
1917 $100 US Internal Revenue Stamp - no gum, perf 12, green
1885 1c Newspaper & Periodical Stamp - plate proof on card, black
1873 24c Official Mail Stamp - War, rose
1890-93 6c brown red
1861 30c orange
1903 24c, Die II on proof paper
1873 15c Official Mail Stamp -yellow
Plate proofs are found on both India paper and card stock. They were made from finished plates and are excellent impressions, showing a sharpness and color far superior to the stamps themselves.