|1¢ WashingtonPerf 8½ Coils|
|US410Perf 8½ Horizontally, Vertical or Endwise Coil||US412Perf 8½ Vertically, Horizontal or Sidewise Coil|
Watermark Check – There is no need to check for watermark or plate type. Both of these stamps are flat plate and single-line watermarked.
|Coil Type||Printing Method||Watermark||US Number|
|Perf 8.5 horizontally||Flat Plate||Single-line||410|
|Perf 8.5 vertically||Flat Plate||Single-line||412|
The 1¢ Washington perf 8½ coils are sometimes faked by adding perforations to the common imperforate stamp, US408, since the cost of certification outweighs the value of the stamp. Check the perforations closely to insure they are genuine.