1955 MAIL HAYWARDS HEATH TO U.S.A./UNDELIVERED/2/6 YELLOW-GREEN (SG509). Envelope Haywards Heath to Pennsylvania, U.S.A. with 2/6 yellow-green (SG509) (several toned perforations) cancelled HAYWARDS HEATH but item returned as unknown and on front fine strike REBUTS/RETOUR (RETURN TO WRITER) hand stamp. On reverse PITTSBURGH date stamp APR 12 1955. (Ref 104119).