1. Blackburn Coll 2/5 Reference (shelfmark): Blackburn Coll 2/5 Title: The Blackburn Collection of Oviedo Censor Marks Scope & Content: Cover dated 14th October 1939 from Las Arriondas with a Heller (2000 Ed) A134.1 type censor mark. Collection Area: Philatelic Collections Languages: English and Spanish Date Range: 14 Oct 1939 Extent: 1 Page; 1 Item