Metropolitan Post Office, New York, (2c) blue, die cut, tied to folded cover front by boxed "PAID / WH LAWS" hanstamp, free strike at left, postmarked "Metropolian / P.O. / Mar / 20", to G. Robertson 135 Water Street, filing fold creasing adhesive, yet a rare franking, with 2023 Philatelic Foundation certificate; ex Caspary, Boker.