3¢ Washington Head Flat Plate – Perf 10
Watermark Check – You will need to check the watermark on this stamp. All of
the 3¢ perf 10 stamps were printed by the flat plate method and are Type I.
The 3¢ perf 10 unwatermarked stamp, US 464, in nicely centered unused condition should be examined carefully, since it is sometimes faked by adding perforations to the imperforate US 483. Although the stamps are, on the surface, nearly equal in value, a well-centered 464 often brings a substantial premium. The 483, being an imperforate stamp, can have as large of margins as desired. We would advise the buyer to be particularly wary of superb jumbo copies of US 464. The 426 has no imperforate equivalent but jumbo copies should have the perfs examined closely for reperforated straight-edges.