1872-1878, B.F. Stevens, London, Despatch Agent, group of three covers comprising 1872 to Chief Engineer on USS Congress bearing two #147 singles; two 1878 to Lt. on USS Gettysburg bearing 5¢ #179 pair and 10¢ brown; couple small flaws, Very Fine and attractive group. Estimate  $200 - 300. $0 (Image)