![O20P4 - 1873 12c Official Mail Stamp - interior, vermilion O20P4 - 1873 12c Official Mail Stamp - interior, vermilion](https://cdn11.bigcommerce.com/s-9xwo1raw7u/images/stencil/500x659/products/82736/63174/USA-O20P4__02354.1711035135.jpg?c=1)
1873 30c Official Mail Stamp,interior, vermilion
# O23P4 - 1873 30c Official Mail Stamp - interior, vermilion
$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.