Lot
1672 
1873, 3¢ War Dept., horizontal pair, tied by "New York 'A' Jun 28 '79" station A duplex on Army Medical Board cover to Columbus Barracks, Ohio, Fine and rare use with an unusual penalty imprint, ex-Lobdell. Scott No. O85 Estimate $200 - 300.
In 1879, the penalty frank use was extended to mail between all government offices. This was a very early use from a field office.
Realized: $250