13 April 1934 registered cover to Lucerne (Switzerland) with ½d, 1d, two 1½d and 3d stamps, cancelled with datestamp D13 (Proud, 2005).  The cover has a Type 4 registration label (Hibbert, 1979) affixed and is backstamped with an AMB (Área Metropolitana de Barcelona) Barna Port 2 May 1934 and a Luzern 3 May 1934 datestamps.