Thailand. (Great Britain). 1905. Illustrated 'Castle in the Highlands' advertising post card headed "Specimen $1, 1s Plate for 2/6' addressed to London bearing Siam SG 69, 2a scarlet and blue tied by Bangkok/ 1 date stamp, underpaid with 'T' in diamond, London arrival 'Dec 6th 05', with hand-struck '1 1/2d/ F.B.' on face and instructional 'Charge Not Collected' in violet. Lovely looking and unusual item of underpaid mail from Siam.