![O33P4 - 1873 30c Official Mail Stamp - Justice, purple O33P4 - 1873 30c Official Mail Stamp - Justice, purple](https://cdn11.bigcommerce.com/s-9xwo1raw7u/images/stencil/500x659/products/85570/65589/USA-O33P4__74773.1711032336.jpg?c=1)
1873 6c Official Mail Stamp,Justice, purple
# O28P3 - 1873 6c Official Mail Stamp - Justice, purple
$19.00
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.