| Scott# 2523 | Plate # 1, 2, 3, 4, 5, 6, 7, 8, 9 (Uncoated Paper - Mottled Tagging) |
| Scott# 2523b | Plate # 1, 2, 3, 4, 6, 7, 9 (Imperf) |
| Scott# 2523c | Plate # 1, 7 (Toledo Brown) (Uncoated Paper - Mottled Tagging) |
| Scott# 2523d | Plate # 2, 6 (Lenz Paper) (Coated Paper - Solid Tagging) |
| Purple Machine Cancel | Plate # 4 |
| Series | American Flag |
| Issue Date & City | March 29, 1991, Mount Rushmore, Keystone, South Dakota |
| Nationwide Sale | March 30, 1991 |
| Designer | Clarence Holbert (BEP) |
| Art Director | Leonard Buckley (BEP) |
| Typographer | Clarence Holbert (BEP) |
| Modeler | Clarence Holbert (BEP) |
| Engravers | Vignette - Thomas R. Hipschen (BEP), Lettering and Numerals - Michael J. Ryan (BEP) |
| To Press / Quantity | Late 1990 / Initial Order 9,948,000,000 |
| Coil Size | 100, 500, 3000 |
| Printer | Bureau Of Engraving and Printing (BEP), Washington, DC |
| Presses | C/D, 901,902 |
| Process | Intaglio |
| Where Printed | BEP, Washington, DC |
| Where Processed | BEP, Washington, DC |
| Plate Size & Interval | 960 (20 x 48) stamps per revolution / plate # every 48 stamps |
| 864 (18 x 48) stamps per revolution / plate # every 48 stamps | |
| Paper and Gum | Prephosphored, Water-Activated |
| Tagging | Prephosphored Paper / Phosphor Coated Paper (Mottled and Solid Tagging) |
| Perf Gauge | 10.2 Vertically |
| Colors (PMS) | Red, Blue, Brown (PMS 497U) |
| Overall Size | apx 0.87 x 0.96 in. / 22.1 x 24.4 mm |
| Earliest Known Use | March 8, 1991 |
| NOTE: | 2523c, the Toledo Brown variety results from brown ink being used instead of the normal maroon ink. |
| NOTE: | For a side-by-side comparison of the Mt. Rushmore stamps, click here. |
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