On February 12, 1958, the Union Bank of Burma introduced the first kyat notes, in denominations of 1, 5, 10 and 100 kyats. These were very similar in design to the last series of rupee notes, issued earlier.
Later on August 21, 1958, 20 and 50 kyats notes were introduced. The 50 and 100 kyat notes were demonetized on May 15, 1964. This was the first of several demonetizations, ostensibly carried out with the aim of fighting black marketeering.