IDENTIFYING THIS STAMP
This is the earlier version of the 10¢ Washington from the years 1851-1857. Later versions had the number '10' in the top corners. The version without the perforations (on the left) is worth a fraction more than the version on the right.
VALUING THE STAMP
With the stamp without perforations (imperforate), the value is quite dependent on how well it was cut. If you see the design clear of the edges on all four sides then you have a more valuable stamp. If, on the other hand the stamp was cut a third of the way into the design, the value will be less.
THE RARE REPRINTS
This stamp was reprinted (shown above) on hard white paper in 1875 and it can be found by clicking here. The odds of finding one are very slim and they require a certificate to verify its identity.