Unified Vietnam, Helicopters, April 12th, 1989, Michel Nr. 2014-2021, Block 68; Seven stamps in nominals of 10D (two stamps), 20D (two stamps), 30D (two stamps) and 50D were issued in perforation 12.75 and imperforate. There was also a souvenir-sheet with a 80D nominal. There are questions about the actual release date of this set. Klewitz reports that it was issued on October 9th, 1988. Also there are letters to Klewitz that use these stamps mailed on March 27th, 1989 so the Michel date is likely incorrect.

Stamps sold at Vietnamese post offices were sold without gum while stamps sold by the official Vietnamese stamp agency had no gum.

Here is the mint perforated set

and here is the mint imperforate set

Registered air mail letter sent on March 27th, 1989 from Ho Chi Minh City to Klewitz. The letter carries half of the perforated Helikopters set plus stamps from the Off-shore Oil Production, Roses, Tourism and Ton Du’c Thang sets for an overall postage of 6,450D (including the red free frank for 5,015D). Green Fulda custom cachet on front.

Registered air mail letter sent on March 27th, 1989 from Ho Chi Minh City to Klewitz. The letter carries the other half of the perforated Helikopters set and perforated souvenir-sheet plus stamps from the USSR Friendship Treaty, Re Cross (imperforate), Mutual Economic Aid, Child Inoculation, Cambodian National Day, INDIA Stamp Exhibition and Tourism sets for an overall postage of 6,280D (including the red free frank for 3,975D). Imperforate stamps on postally used cover are very rare. Green Fulda custom cachet on front.

Registered air mail letter sent on March 27th, 1989 as a mixed currency franking from Ho Chi Minh City to Klewitz. The letter carries half of the perforated Helikopters set plus stamps from the Hydro Stations and Water Flower sets. The Water Flower stamps were still denominated in old Dong while all other stamps were already denominated in new Dong.  The Vietnamese Government conducted a devaluation of the Dong on September 14th, 1985. This meant that all stamps issued prior to this date were only worth one tenth at the time of mailing. The overall postage hence amounted to 2.60 oD = 0.26 nD. plus the stamps in new Dong (2,130 nD) plus the red free frank for 6,880 nD for 9,010.26nD.

Registered air mail letter sent on March 27th, 1989 as a mixed currency franking from Ho Chi Minh City to Klewitz. The letter carries the other half of the perforated Helikopters set and souvenir-sheet plus stamps from the Flower and Water Flower sets. The Flower and Water Flower stamps were still denominated in old Dong while all other stamps were already denominated in new Dong.  The Vietnamese Government conducted a devaluation of the Dong on September 14th, 1985. This meant that all stamps issued prior to this date were only worth one tenth at the time of mailing. The overall postage hence amounted to 4 oD = 0.40 nD. plus the stamps in new Dong (110 nD) plus the red free frank for 8,910 nD for 9,020.4nD.

Registered air mail letter sent on March 27th, 1989 as a mixed currency franking from Ho Chi Minh City to Klewitz. The letter carries half of the imperforate Helikopters set plus stamps from the Hydro Stations, INDIA Stamp Exhibition and Butterflies sets. Imperforate stamps on postally used cover are very rare. The Butterflies stamps were still denominated in old Dong while all other stamps were already denominated in new Dong.  The Vietnamese Government conducted a devaluation of the Dong on September 14th, 1985. This meant that all stamps issued prior to this date were only worth one tenth at the time of mailing. The overall postage hence amounted to 3 oD = 0.30 nD. plus the stamps in new Dong (3,700 nD) plus the red free frank for 6,710 nD for10,410.3nD. Fragment of the green Fulda custom cachet on front.

Registered air mail letter sent in June of 1989 as a mixed currency franking from Ho Chi Minh City to Klewitz. The letter carries the other half of the imperforate Helikopters set and imperforate souvenir-sheet plus stamps from the Hydro Stations, INDIA Stamp Exhibition, Butterflies, Nguyen Trai, Friedship and Sea Shell sets. Imperforate stamps and souvenir-sheets on postally used cover are very rare. The Friendship, Butterflies and Nguyen Trai stamps were still denominated in old Dong while all other stamps were already denominated in new Dong.  The Vietnamese Government conducted a devaluation of the Dong on September 14th, 1985. This meant that all stamps issued prior to this date were only worth one tenth at the time of mailing. The overall postage hence amounted to 3.24 oD = 0.24 nD. plus the stamps in new Dong (3,800 nD) plus the red free frank for 6,660 nD for 10,460.24nD. Fragment of the green Fulda custom cachet on front.

Registered air mail letter sent in May of 1989 as a mixed currency franking from Ho Chi Minh City to Klewitz. The letter carries the perforated Helikopters set plus stamps from the Reforestation (imperforate), Mushroom, Cambodian National Day and Sea Shell sets. Imperforate stamps on postally used cover are very rare. The Reforestation stamps were still denominated in old Dong while all other stamps were already denominated in new Dong.  The Vietnamese Government conducted a devaluation of the Dong on September 14th, 1985. This meant that all stamps issued prior to this date were only worth one tenth at the time of mailing. The overall postage hence amounted to 1.20 oD = 0.12 nD. plus the stamps in new Dong (875 nD) plus the red free frank for 5,880 nD for 6,755.12nD. Fragment of the green Fulda custom cachet on front.

Registered air mail letter sent in October of 1989 from Ho Chi Minh City to Klewitz. The letter carries the perforated and imperforate souvenir-sheet of the Helikopter set plus stamps from the Turtle, Hydro Stations, Cambodian National Day and French Revolution sets for an overall postage of 9,960D (including the red free frank for 6,470D). Souvenir-Sheets on postally used cover are very rare.

Registered air mail letter sent in June of 1989 from Ho Chi Minh City to Klewitz. The letter carries the perforated  and imperforate Animals souvenir-sheets plus stamps from the Helikopter, Hydro Stations, USSR Peace Treaty, Cambodian National Day and INDIA Stamp Exhibition sets for an overall postage of 10,780D (including the red free frank for 7,360D). Souvenir-sheets on postally used cover are very rare. Fragment of the green Fulda custom cachet on front.

Registered air mail letter sent in June of 1989 from Ho Chi Minh City to Klewitz. The letter carries the perforated and imperforate INDIA Stamp Exhibition set plus stamps from the National Assembly, Off-shore Oil Production and Helicopter sets for an overall postage of 11,210D (including the red free frank for 8,010D). Imperforate stamps on postally used cover are very rare. Fragment of the green Fulda custom cachet on front.

Registered air mail letter sent in July of 1989 from Ho Chi Minh City to Klewitz. The letter carries perforated Dog stamps plus stamps from the Monkeys, Helicopters (imperforate), Ceramics and Hydro Station sets for an overall postage of 9,520D (including the red free frank for 6,350D). Imperforate stamps on postally used cover are very rare. Fragment of the green Fulda custom cachet on front.

Registered air mail letter sent in September of 1989 from Ho Chi Minh City to Klewitz. Th letter carries the perforated Thanh Giong set plus stamps from the Off-shore Oil Production, Helicopters, Bicycles and Communication sets for an overall postage of 9,860D (including the red free frank for 7,700D)

Registered air mail letter sent in September of 1989 from Ho Chi Minh City to Klewitz. Th letter carries the imperforate Thanh Giong set plus stamps from the Helicopters (including the stamp from the souvenir-sheet) and French Revolution I sets for an overall postage of 9,4100D (including the red free frank for 7,740D). Imperforate stamps on postally used cover are very rare.

Registered air mail letter sent in September of 1989 from His Chi Minh City to Klewitz. Th letter carries perforated Flower stamp plus stamps from the Helicopter and French Revolution I set for an overall postage of 9,860D (including the red free frank for 8,420D).

Registered air mail lettre sent in July of 1990 as a mixed currency franking from Ho Chi Minh City to Klewitz. The letter carries the perforated and imperforate Communication stamp plus stamps from the Off-shore Oil Production, Ice Skating (stamp from the souvenir-sheet), Helicopters, French Revolution I, Animals and Communication Year sets. The Communication stamps all show a vertical double perforation across the center of the stamps. Imperforate and error stamps on postally used cover are very rare.The Communication Year stamps from 1983  were still denominated in old Dong while all other stamps were already denominated in new Dong.  The Vietnamese Government conducted a devaluation of the Dong on September 14th, 1985. This meant that all stamps issued prior to this date were only worth one tenth at the time of mailing. The overall postage hence amounted to 2.50 oD = 0.25nD. plus the stamps in new Dong (2,220 nD) plus the red free frank for 7,250 nD for 9,470.25 nD. Fragment of the green Fulda custom cachet on front.

Registered air mail letters ent in October of 1989 from Ho Chi Minh City to Klewitz. The letter carries perforated Horses stamps plus stamps from the Paracel and Spratly Islands (imperforate), FINLANDIA Turtles, Helicopters, French Revolution I, Hydro Stations and Thanh Giong sets for an overall postage of 9,860D (including the red free frank for 5,240D). Imperforate stamps on postally used cover are very rare.

Registered air mail letters ent in October of 1989 from Ho Chi Minh City to Klewitz. The letter carries perforated Horses stamps plus stamps from the Paracel and Spratly Islands (imperforate), FINLANDIA Turtles, Bicycles, French Revolution I, Off-shore Oil Production and Thanh Giong sets for an overall postage of 9,410D (including the red free frank for 6,580D). Imperforate stamps on postally used cover are very rare.

Registered air mail letter sent in April of 1990 from Ho Chi Minh City to Klwitz. The letter carries the imperforate Duck sheetlet plus stamps from the Locomotives (souvenir-sheet), Communication, 60 Years Communist Party I, Helicopters (souvenir-sheet) and 70 Years October Revolution (souvenir-sheet) sets for an overall postage of 14,850D (including the red free frank for 8,180D). Souvenir-sheets on postally used cover are very rare. Green Fulda custom cachet on front.

Registered air mail letter sent in May of 1990 from Ho Chi Minh City to Klewitz. The letter carries imperforate Truck stamps plus stamps from the Cuban Revolution, Helicopters (imperforate) and Communist Party I  sets for an overall postage if 8,840D (including the red free frank for 5,000D). Imperforate stamps on postally used cover are very rare. Fragment of the green Fulda custom cachet on front.

Registered air mail letter sent in May of 1990 from Ho Chi Minh City to Klewitz. The letter carries imperforate Truck stamps plus stamps from the 40 Years East Germany, Inter-Parlamentarian Union and Dog sets for an overall postage if 8,920D (including the red free frank for 3,350D). Imperforate stamps on postally used cover are very rare. Fragment of the green Fulda custom cachet on front.

Registered air mail letter sent in February of 1995 from Ho Chi Minh City to Klewitz. The letter carries the Cicilian Air Traffic set plus stamps from the Helicopters (souvenir-sheet) and Beetles sets for an overall postage of 18,380D (including the red free frank for 500D). Souvenir-sheets on postally used cover are very rare. Fulda arrival cancel on the reverse.

Registration Nr. 104780

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