Unified Vietnam, 100 Years Labour Day, May 1st, 1986, Michel Nr. 1681-1682; On May 1st, 1886 workers under the guidance of the American Federation of Labour started a strike for social justice. 1889 the founding congress of the II. International decided to celebrate the day as a day of demonstrations as of May 1st, 1890. Two stamps in nominals of 1D and 5D were issued in perforation 11.

There are some color variances on both values. Here is the 1D value in grey-blue/dark-red and blue/light-red

Here is the mint 5D value in purple-brown/light-red, brown/red and Dark-brown/dark-red.

In June/July of 1987 a late printing occurred that shows yet different colors. Here are mint blocks of four in the colors blue-orange-red and brown/orange-red.

These stamps were not officially released imperforate however a number of imperforate trial proofs has come to market. Here are imperforate pairs from the top right sheet margin.

Here is an imperforate  block of four of the 1D value that shows a printing error of an upside-down printing of the red color and a significant passer-shift of the red color.

Mint imperforate block of four of the 1D value which shows a printing error of an upside-down print of the red color on the bottom pair and a missing red printing run on the upper pair. 

Mint imperforate block of four of the 5D value that shows a printing error of a double upside-down red printing run and a significant passer-shift of the red color.

Here is a similar error on another imperforate block of four.

Registered air mail letter sent in May of 1986 as a mixed currency franking from Ho Chi Minh City to Klewitz. The letter carries a mix of stamps denominated in old Dong (Communist Party, Intercosmos) and new Dong (Laos, Reconstruction, Le’Lo’i). 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  1.84 oD =0.18 nD. plus the stamps in new Dong (15D) plus the red free frank for 23D for 39.84 nD. Fragment of green Fulda custom cachet on the reverse.

Registered air mail letter sent in June of 1986 as a mixed currency franking from Ho Chi Minh City to Klewitz. The letter carries a mix of stamps denominated in old Dong (Communist Party, Cacti, Liberation of Hai Phong, National Liberation Front) and new Dong (National Assembly Labor Day). The two National Assembly stamps on the reverse both shows the plate error of “broken jacket line on HCM#s left side. Error 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  17.12 oD =1.71 nD. plus the stamps in new Dong (7D) plus the red free frank for 24D for 32.71 nD. Fragment of green Fulda custom cachet on front.

Registered air mail letter sent in September of 1986 as a mixed currency franking from Ho Chi Minh City to Klewitz. The letter carries a mix of stamps denominated in old Dong (Hanoi Liberation, Rabrindanaht) and new Dong (Labor Day, United Nations, Halley, Traditional Houses). 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 (38D)  for 38.26 nD. Fragment of green Fulda custom cachet on front.

Registered air mail letter sent in October of 1986 as a mixed currency franking from Ho Chi Minh City to Klewitz. The letter carries a mix of stamps denominated in old Dong (Liberation of South Vietnam) and new Dong (Reconstruction, Labor Day, Traditional HousesDam Building). There are different color variations on the Labor Daystamps 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 (34D)  for 34.2 nD. Fragment of green Fulda custom cachet on the reverse.

Registered air mail letter sent in November of 1986 as a mixed currency franking from Ho Chi Minh City to Klewitz. The letter carries a mix of stamps denominated in old Dong (Peoples Army) and new Dong (Labor Day, Traditional Houses, Thälmann). Souvenir-sheets 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  10 oD =1 nD. plus the stamps in new Dong (33D) for 34 nD. Fragment of green Fulda custom cachet on the reverse.

Registered air mail letter sent in December of 1986 as a mixed currency franking from Ho Chi Minh City to Klewitz. The letter carries a mix of stamps denominated in old Dong (Train Engines) and new Dong (Labor Day, Vietnamese Post, KPdSU, Communist Party). The Labor Day stamps are present with all three different color variations and the Vietnamese Post stamps are imperforate. Errors stamps and 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  9 oD =0.90 nD. plus the stamps in new Dong (34D) plus the red free frank for 376D for 410.9 nD. Fragment of green Fulda custom cachet on front.

Air mail letter sent in April of 1987 from Ho Chi Minh City to Klewitz. The letter carries the two Labor Day stamps in imperforate pairs  and the there is a trial proof with an upside-down red printing  run.  Imperforate stamps and trial proofs on postally used cover are very rare. The overall postage amounted to 20D

Air mail letter sent as a mixed currency mailing in May of 1987 from Ho Chi Minh City to Klewitz. The letter carries the two imperforate Labor Day stamps  and the there is a block of four of an imperforate  trial proof with an upside-down red printing  run.  There are also two August Revolution stamps that were still denominated in old Dong.  Imperforate stamps and trial proofs 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  20 oD =2 nD. plus the stamps in new Dong (26D) for 28 nD.

Registered air mail letter sent in August of 1987 as a mixed currency franking from Ho Chi Minh City to Klewitz. The letter carries a mix of stamps denominated in old Dong (Robert Koch) and new Dong (Labor Day, Halley, Red Cross, Five Billion People ). 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 oD =1 nD. plus the stamps in new Dong (138D) plus the red free frank for 49D for 188 nD. Fragment of green Fulda custom cachet on front.

Registered air mail letter sent in April of 1987 from Ho Chi Minh City to Klewitz. The letter carries five 1D Communist Party stamps that are imperforate on the right sheet margin. The top stamp of the right pair shows the plate error of  “white dot in hammer”. There are also stamps from the Poultry (imperforate), Labor Day and Reconstruction sets. Error and imperforate stamps on postally used cover are very rare. The overall postage of the letter amounted to 590D (including the red free frank for 462D). Fragment of the green Fulda custom cachet on front.

Registered air mail letter sent in April of 1987 as a mixed currency franking from Ho Chi Minh City to Klewitz. The letter carries perforated stamps and the souvenir-sheet from the Wickerwork, Poultry, Reconstruction, Communist Party and Labor Day sets for an overall postage of 614D (including the red free frank for 488D. Souvenir-Sheets on postally used cover are very rare. Fragment of the green Fulda custom cachet on front.

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, Labor Day, Reunification, Traditional Houses (imperforate), Year of the Car (Imperforate), Union Congress  and Asian Games (color varieties) sets. Imperforate stamps on postally used cover are very rare. The Union Congress and Asian Games 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 (59 nD) plus the red free frank for 275 nD for 334.3nD. Fragment of the green Fulda custom cachet on front.

Registered air mail letter sent in July of 1987 from Ho Chi Minh City to Klewitz. The letter carries three of the perforated National Assembly stamp set plus stamps from the Traditional Houses (Imperforate), Communist Party,  Bonsai, Labor Day and Rare Plants sets for an overall postage of 383D (including the red free frank for 272 D). Imperforate stamps on postally used cover are very rare. Fragment of the green Fulda custom cachet on front.

Postally issued aerogramme that features pictures of a modern high-rise hotel in front and the HCM Market Hall on the reverse. The aerogramme was franked with stamps from the KPdSU, Labor Day and Reconstruction stamps for an overall postage of 16D and sent in September of 1988 from Tan Binh to Klewitz.

Registration Nr. 104060

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