Unified Vietnam, Stamp Exhibition TEMBAL 83 Basel, May 21st, 1983, Michel Nr Block 19; A single souvenir sheet with a 10D nominal value was issued in perforation 13 and imperforate.
Here is the mint perforated sheet.
and the mint imperforate sheet.
First Day Cover featuring the perforated souvenir sheet.
Registered air mail letter sent from Nguyen Trai to Klewitz in February of 1984. The letter carries the perforated souvenir sheet, stamps from Dahlia set and other contemporary NVN stamps for an overall postage of 16.68D (including the red free frank of 4.30D). Souvenir sheet on postally used cover are very rare. Green Fulda custom cachet on front.
Registered air mail letter sent from Ho Chi Minh City to Klewitz in April of 1984. The letter carries the imperforate souvenir sheet, a pair of the 6xu Socialist Republic stamp (with small and large star variety), Wading Bird, Mushroom and Rafaell stamps for an overall postage of 57.72D. Souvenir sheets and error stamps on postally used cover are very rare. Partial green Fulda custom cachet on the reverse.
Registration Nr. 103420