Thailand. (Great Britain). 1951. Envelope addressed to Bangkok bearing Great Britain SG 514, 4d blue tied by Northwood roller '1st June 51' with circular 'Returned Letter Section/ Thailand' on reverse and framed instructional 'Parti/Left' and 'Retour/ Returned' in carmine on face with boxed 'Undelivered For Reason Stated/ Return To Sender' in violet on face with 'Officially Sealed in the Returned Letter Branch/ London Postal Region' on reverse. Attractive item.