Blood's Type 10 Handstamp on Illustrated Advertising Cover with #94 "F" Grill

With a PF Certificate which states, "BLOOD'S TYPE 10 HANDSTAMP ON "SEEDS AND FARM MACHINERY" ADVERTISING COVER WITH SINGLE "F". GRILL WITH BLUE QUARTERED CORK CANCEL AND MATCHING "PHILAD'A, PA. FEB 22 (1861)" PMK TO GERMANTOWN, PA, BLACK "CARRIER FEB 23" HANDSTAMP. AND WE ARE OF THE OPINION THAT IT IS A GENUINE USE, THE COVER WITH A REPAIRED TEAR AT TOP, THE STAMP WITH TONED PERFS AT TOP."