![O66P2 - 1873 30c Official Mail Stamp - green O66P2 - 1873 30c Official Mail Stamp - green](https://cdn11.bigcommerce.com/s-9xwo1raw7u/images/stencil/500x659/products/82965/63367/USA-O66P2__77802.1711046274.jpg?c=1)
1873 30c Official Mail Stamp,State, green
# O66P4 - 1873 30c Official Mail Stamp - State, green
$7.50 - $12.00
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.