Great Britain. (Portugal). 1874. Envelope addressed to Porto bearing SG 125, 6d grey plate 12 tied by Manchester/498 duplex 'Mar 4' , endorsed 'per "Castilian" via Liverpool' with oval 'Franca' and framed 'Via de Mar' on face with Lisboa and Porto arrival '11/3' on reverse. Very attractive and lovely quality cover, Cat 300 GPB.