4th Congress of the Communist Party Vietnam, December 10th, 1976, Michel Nr. 880-881; Two stamps both in a 12xu nominal were issued in perforation 11.0.

Here is the mint set that shows a double impression of the back color. This was caused by the rubber mat in the printing process being too lose which caused the mat to vibrate.

Here is a much rarer error set on which the entire black printing process is missing. Only the grey color is visible resulting in the top imprint “Dao Hoi” missing entirely. The other inscription only shows up in the grey.

Rare single franking of the 12xu value on a local letter sent from Chauthnh (small post office) to HCM City in September of 1978. Ben Tre transit and HCM City arrival cancels on the reverse.

Another rare single franking of the other 12xu value on a local letter sent from Viet Yen (small post office) to Ha Son Binh in May of 1977.

Rare mixed franking on a local letter (full content preserved) sent from Long Xuyen (small post office) to Gia-Dinh in January of 1977 paying an 18xu postage.

Mixed franking of three of the 12xu National Assembly stamps together with the Communist Party set plus two 1D Air Defense stamps paying an an overall postage of 2.60D on an air-mail letter sent to Paris, France.

Registration Nr. 102490

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