The set was also issued imperforate. The same set was re-released in May of 1964 with a MAY 29 overprint. The Gibbons catalog incorrectly lists the date of the MAY 29 issue as September 15, 1964. Gibbons gives a release date of December 15, 1964. The story behind this issue is long and complex and will not be dealt with here.
Many varieties exist.
The 10np value of the unapproved overprint that was purchased from the late Ezzet Mosden. What caught my eye was that it had a Kennedy overprint that I had not previously seen. He indicated he did not remember anything about it. I therefore assumed it was a stamp that someone had played with and considered it another of the Dubai unsolved mysteries. About a year or so later in my correspondence with Michel Stephan of the Barody Stamp Company, who had the original contract to print and distribute the earlier Dubai stamps, I mentioned the item and asked if he knew anything about it.