Viet-Nam. (South Viet-Nam - Belgium). 1973. Air mail envelope addressed to Saigon, South Viet-Nam bearing Belgium 2f grass-green and 3f 50 brown (2) tied by slogan date stamp, underpaid with framed 'T 4/ 8' hand-stamp and bearing Viet-Nam postage due SG SD316, 5d multi-coloured and SG SD317, 10d multi-coloured (pair) tied by Saigon arrival.
Underpaid commercial mail to South Viet-Nam with postage dues, very scarce.