Circa 1950. Printed black on buff 'Secretaria de Communicacions y Transportes' OFFICIAL envelope with 'Arms' at top left and 'Official' penalty imprint at top right. Inscribed 'Forma D G C - 237' at top right. Unused.
Circa 1950. Printed black on buff 'Secretaria de Communicacions y Transportes' OFFICIAL envelope with 'Arms' at top left and 'Official' penalty imprint at top right. Inscribed 'Forma D G C - 237' at top right. Unused.