![O42P4 - 1873 15c Official Mail Stamp - ultramarine, navy O42P4 - 1873 15c Official Mail Stamp - ultramarine, navy](https://cdn11.bigcommerce.com/s-9xwo1raw7u/images/stencil/500x659/products/63769/47067/USA-O42P4__89313.1711055649.jpg?c=1)
1873 15c Official Mail Stamp ultramarine, navy
# O42P1 - 1873 15c Official Mail Stamp ultramarine, navy
$100.00
Official Mail Stamps- Missing From Many Collections
Official Mail stamps, also known as departmental stamps, were developed in the 19th century as a means of accounting for postage on mail sent by various federal departments. These are a neat area of philately, and would make a great addition to your U.S. collection.
Official Mail Stamps- Missing From Many Collections
Official Mail stamps, also known as departmental stamps, were developed in the 19th century as a means of accounting for postage on mail sent by various federal departments. These are a neat area of philately, and would make a great addition to your U.S. collection.