1917-19 Flat Plate Printing - no watermark #498-518

The Experiment Continues
While Perf. 12 made stamp sheets and coil rolls too brittle, the adoption of Perf. 10 caused the opposite problem -- Perf. 10 stamps were difficult to separate, often resulting in torn, ragged perforations. The Post Office decided to try Perf. 11 as a compromise.

View as Grid List

22 Items

Page
per page
Set Descending Direction
  1. # 498 - 1¢ Washington - green
    mint
    $0.90
    used
    $0.25
  2. # 499 - 2¢ Washington - rose Type I
    mint
    $0.90
    used
    $0.25
  3. # 500 - 2¢ Washington - deep rose (Ia)
    mint
    $320.00
    used
    $250.00
  4. # 501 - 3¢ Washington - violet Type I
    mint
    $20.00
    used
    $0.40
  5. # 502 - 3¢ Washington - violet Type II
    mint
    $24.00
    used
    $1.25
  6. # 503 - 4¢ Washington - brown
    mint
    $15.00
    used
    $0.50
  7. # 504 - 5¢ Washington - blue
    mint
    $12.50
    used
    $0.40
  8. # 505 - 5¢ Washington - rose ERROR
    mint
    $550.00
  9. # 506 - 6¢ Washington - red orange
    mint
    $17.50
    used
    $0.50
  10. # 507 - 7¢ Washington - black
    mint
    $34.00
    used
    $1.75
  11. # 508 - 8¢ Franklin - olive bistre
    mint
    $20.00
    used
    $1.00
  12. # 509 - 9¢ Franklin - salmon red
    mint
    $20.00
    used
    $3.00
  13. # 510 - 10¢ Franklin - orange yellow
    mint
    $25.00
    used
    $0.30
  14. # 511 - 11¢ Franklin - light green
    mint
    $16.00
    used
    $4.00
  15. # 512 - 12¢ Franklin - claret brown
    mint
    $16.00
    used
    $0.75
  16. # 513 - 13¢ Franklin - apple green
    mint
    $19.50
    used
    $9.00
  17. # 514 - 15¢ Franklin - gray
    mint
    $55.00
    used
    $1.75
  18. # 515 - 20¢ Franklin - ultramarine
    mint
    $62.00
    used
    $0.60
  19. # 516 - 30¢ Franklin - orange red
    mint
    $49.00
    used
    $1.75