cover 3d., 4d. green and brown, 1/-, each on separate envelope registered locally in Manchester, tied by fine strikes of the circular double-ring "POSTAGE STAMP EXHIBITION & CONGRESS/MANCHESTER" datestamps for 20 Feb. with additional strike tying the registration label, also a 1d. similarly cancelled on souvenir card for the exhibition; some minor soiling and a few negligible tone spots but otherwise fine