Unified Vietnam, 40 Years Dam Construction Committee, May 22nd, 1986, Michel Nr. 1683; A single stamp with a 1D nominal was issued in perforation 11:10.75.

There were some color variations on this issue, which are represented below.

Mint block of six in light-pink/brown

Mint pair of the stamp in purple/brownish color

Mint pair of the stamp in pink/purple-red color (the left stamp also shows the plate error of “dot on H of CHINH”)

This stamp was not officially released imperforate however some imperforate trial proofs have come to market. Here is an imperforate corner block on which the top left stamp shows the plate error of “dot on H of CHINH”.

Detailed scan of the affected area.

Mint block of fifteen imperforate trial proofs that also has an up-side down double printing of the red printing process on the reverse.

Front (the 2nd and 14th stamp show the plate error of “dot on H of CHINH”

Reverse

Mint block of four trial proofs on which the two top stamp show the normal print and the two bottom stamps show an additional black printing run that is upside-down. There is also an upside-down print of the black printing run on the reverse.

Front

Reverse

Mint block of four trial proofs on which all stamps show  an additional black printing run that is upside-down. There is also an upside-down print of the black printing run on the reverse.

Front

Reverse

Mint block of four trial proofs on which the two top stamp show only the black printing run and the two bottom stamps show an additional black printing run that is upside-down and a red printing run with a significant passer-shift. There is also an print of the black printing run on the reverse.

Front

Reverse

Mint block of four in pink/lilaq-red colors on which the top right stamp shows the plate error of “dot on H of CHINH”

Detailed scan of the affected area.

Mint block of four which shows a perforation error. Due to the still very manual perforation process it could happen that some stamps were larger than others. The pair here shows narrower stamps on the left and wider stamps on the right.

Mint block of thirty mint stamps on which a number of stamps show plate errors. The 1st, 3rd, 17th and 19th stamp show the plate error of “dot on H of CHINH” and the 8th stamp the plate error “line at bottom of U of BUU”.

Detailed scans of the affected areas

Registered air mail letter mailed in June of 1986 from Ho Chi Minh City to Klewitz. The letter carries four of the Dam Building stamps of which one on the reverse has the plate error of “dot on H of CHINH”. There are also stamps from the National Assembly and Reconstruction sets for an overall postage of 29 Dong. Green Fulda custom cachet on front.

Registered air mail letter sent in June of 1986 as a mixed currency franking from Ho Chi Minh City to Klewitz. The letter carries stamps that were still denominated in old Dong (Cacti (imperforate), Socialist Republic) and new Dong (Dam Building, National Assembly, Reconstruction). There is also the military free frank from 1984 that was not valid for international postage but apparently was accepted by the postal clerk nevertheless. Imperforate stamps on postally used cover are very rare. 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  8.62 oD =0.86 nD. plus the stamps in new Dong (21 nD) plus the red free frank for 17 nD for 38.86 nD. Fragment of green Fulda custom cachet on front.

Registered air mail letter sent in June of 1986 as a mixed currency franking from Ho Chi Minh City to Klewitz. The letter carries stamps that were still denominated in old Dong (National Games, Hymenoptera, Day of the Post) and new Dong (National Assembly, Reconstruction, Dam Building).  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  13.32 oD =1.33nD. plus the stamps in new Dong (24 nD) plus the red free frank for 17 nD for 42.33nD. Fragment of green Fulda custom cachet on front.

Registered air mail letter sent in June of 1986 as a mixed currency franking from Ho Chi Minh City to Klewitz. The letter carries stamps that were still denominated in old Dong (Day of the Post, World Communication Year, Hymenoptera) and new Dong ( Reconstruction, Dam Building).  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  4.52 oD =0.45 nD. plus the stamps in new Dong (15 nD) plus the red free frank for 16 nD for 33.45nD. Fragment of green Fulda custom cachet on front.

Registered air mail letter sent in June of 1986 as a mixed currency franking from Ho Chi Minh City to Klewitz. The letter carries stamps that were still denominated in old Dong (Socialist Republic, Union Congress, Cacti (imperforate), Karl Marx) and new Dong (National Assembly, Reconstruction, Dam Building, Halley).  Imperforate stamps on postally used cover are very rare. There is also a Invalid free frank issued in 1984 that was not valid for international postage but apparently was nevertheless accepted by the postal clerk. 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  3.56 oD =0.36 nD. plus the stamps in new Dong (27 nD) plus the red free frank for 11 nD for 38.36 nD. Fragment of green Fulda custom cachet on front.

Registered air mail letter sent in June of 1986 as a mixed currency franking from Ho Chi Minh City to Klewitz. The letter carries stamps that were still denominated in old Dong (Mammals, Communication Day) and new Dong (National Assembly, Reconstruction, Dam Building). 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  2.52 oD =0.25 nD. plus the stamps in new Dong (16 nD) plus the illegible red free frank. Fragment of green Fulda custom cachet on front. Unusual German registration label for incoming registered mail.

Registered air mail letter sent in November of 1986 as a mixed currency franking from Ho Chi Minh City to Klewitz. The letter carries stamps that were still denominated in old Dong (Friendship, Dahlia (imperforate)) and new Dong (National Assembly, Halley (imperforate), Dam Building, Post Office, Traditional Houses).  Imperforate stamps on postally used cover are very rare. 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 oD =0.20 nD. plus the stamps in new Dong (23 nD) plus the red free frank for 10 nD for 33.2 nD. Fragment of green Fulda custom cachet on front. Unusual German registration label for incoming registered mail.

Registered air mail letter sent in December of 1986 as a mixed currency franking from Ho Chi Minh City to Klewitz. The letter carries stamps that were still denominated in old Dong (Train Engines) and new Dong (KPdSU, Traditional Houses, Dam Building, Post Office). There are a number of different color varieties on the Dam Building stamp. 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 10.8 oD =1.08 nD. plus the stamps in new Dong (15 nD) plus the red free frank for 397 nD for 413.08 nD. Fragment of green Fulda custom cachet on front.

Registered air mail letter sent in June of 1987 from Ho Chi Minh City to Klewitz. The letter carries two blocks of four of both color variations of the Union Congress stamp plus stamps from the National Assembly, Dam Construction and Rare Plant sets for an overall postage of 373 (including the red free frank for 279D). Fragment of the green Fulda custom cachet on front.

Air mail letter sent in December of 1986 from Ho Chi Minh City to Klewitz. The letter carries the entire imperforate Bronze Vessel set plus the imperforate 20D Reconstruction stamp for an overall postage of 40D. Imperforate stamps on postally used cover are very rare.

Registered air mail letter sent in April of 1987 as a mixed currency franking from Ho Chi Minh City to Klewitz. The letter carries stamps from the Indochina War (including one imperforate stamp), Reunification, Poultry (partially imperforate), Year of the Car (Imperforate), Union Congress  and Dam Building sets. Imperforate stamps on postally used cover are very rare. The Union Congress 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  8 oD =0.80 nD. plus the stamps in new Dong (61 nD) plus the red free frank for 187 nD for 248.80 nD. Fragment of the green Fulda custom cachet on front.

Air mail letter sent in June of 1987 from Ho Chi Minh City to Klewitz. The letter carries the entire National Assembly imperforate trial proof set without the red flag in the stamp design and stamps from the Reforestation and Dam Building sets for an overall postage of 116.30D. Trial proofs on postally used cover are basically unheard of. Extremely rare.

Registration Nr. 104070

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