Lot no. 110

6 d. olive-yellow, 2 single stamps, one with clear to good margins, the other one slightly cut-into at 2 sides, tied by circular obliterators to lettersheet (bottom flap missing) with adjacent dispatch mark "U.S. EXPRESS MAIL BOSTON JUN 29" (1857) to St. John; the franking applied enroute on board the steamer "Adelaide"; large part of arrival mark on front; the cover small faults; a fine and rare double-rate steamship cover, supposed to be unique; certificate BPA (1998)