Registered cover franked with top marginal block of four 1935 1p on 10d turquoise blue 'Harrison' printing with overprint in 'Spanish Currency' (SG 159) tied by two strikes of oval REGISTERED BRITISH P.O. LARACHE cancel dated 13 MAY 1937 with printed blue on white 'LARACHE, MOROCCO' registration label alongside. Addressed to TANGIER.