![O78P3 - 1873 12c Official Mail Stamp -Treasury, brown O78P3 - 1873 12c Official Mail Stamp -Treasury, brown](https://cdn11.bigcommerce.com/s-9xwo1raw7u/images/stencil/500x659/products/86441/66327/USA-O78P3__38263.1711104075.jpg?c=1)
1873 12c Official Mail Stamp,Treasury, brown
# O78P4 - 1873 12c Official Mail Stamp - Treasury, brown
$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.