A single stamp in the nominal of 150D and perforated 11.5 was issued on November 7th, 1958.
Here is the mint stamp from the top right corner printed on tanned paper.
![](https://vietnamcollector.com/wp-content/uploads/2019/01/IMG_20190122_0001-7-300x234.png)
Here is the cancelled to order stamp printed on white paper.
![](https://vietnamcollector.com/wp-content/uploads/2019/01/IMG_20190122_0002-6-300x265.png)
Postally used specimens are, as usual, very hard to find. Here is a piece from a package wrapper that features two of the Engineering Exhibition stamps.
![](https://vietnamcollector.com/wp-content/uploads/2019/01/IMG_20190122_0003-4-300x116.png)
Another single postally used stamp off paper.
![](https://vietnamcollector.com/wp-content/uploads/2019/03/IMG_0013-5-300x266.png)
Mixed franking of the 50D Defense of Country value together with the 150D Engineering Exhibition stamp for an overall postage of 200D on a postcard to Czechoslovakia.The cars was most likely sent by a member of there Czechoslovakian Embassy as members thereof had access to service stamps.
![](https://vietnamcollector.com/wp-content/uploads/2019/03/IMG_0001-42-300x210.png)
Registration Nr. 100140
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