The 1 pyacoin was first issued by Myanmar during 1952. In 1966, a new issue was made. These coins were the lowest valued coins of the third kyat. They were eventually demonetized and not commonly found in circulation today.
During 1952, Myanmar issued the first 1 pya coin. They were composed of bronze, had a mass of 2.2 grams, a diameter of 18 millimeters, and a thickness of 1.24 millimeters. Displayed on the obverse of the first 1 pya coin was a Chinze lion. Shown on the reverse was the value and year (written in Burmese) surrounded by sprays. They were used until 1953 and reintroduced in 1955 and 1965. About 59,500,000 coins were minted.
In 1966, a new 1 pya coin was issued. Unlike the previous coin, this one was composed of aluminum, which resulted in it being significantly lighter than its predecessor. The coin was only 0.6 grams and 17 millimeters in diameter. Displayed on the obverse was an effigy of GeneralAung San and the inscription, "ပြည်ထောငိစုမြန်မာနိုငိငိတော်". Shown on the reverse was the value and year of minting surrounded by sprays. These coins were only minted during 1966 and had a total mintage of 8,000,000.