Trinidad. (Argentina). 1938. Registered envelope written from the French Consulate 'La Trinitie' with cachet on reverse addressed to Argentina bearing Trinidad SG 250, 6c sepia and blue and SG 253, 24c black and olive (pair) tied by Registration/ Trinidad date stamp '28th Dec 38' with Trinidad registration label on reverse and oval hand-stamp 'R' with framed Argentina instructional 'Parti' and hand-struck 'Rebuts/ Republica Argentina' in red on face with Certificados/ Central/ 278' arrival on reverse endorsed 'Opened in error in R.L.O.' with 'Post Office Department/ Officially Sealed/Trinidad' labels (2) tied by 'Returned Letter Branch/ Trinidad' date stamp in red on reverse '30th Mar 39' . Superb item for the Exhibitor.