Baltimore Carrier, 1LB8, 1c Black, Position 2 Short Rays 1LB8b, Position 7 "SENT" 1LB8a,

Illustrated in Penny Post April 2008, Figure 6, "ONS" Error on the Baltimore Running Horse Government City Dispatch Carrier Stamp By Larry Lyons
Original gum, never hinged, except Position 4 which was previously hinged. There is an extraneous ink mark at right. Light creases, otherwise very fine.