The T-54 was produced in the Soviet Union until 1981 and also in China (as the Type 59), Czechoslovakia, and Poland.
T-54B Medium Tank
The T-54B differed from the T-54 in several areas. The 100mm gun mounted a cylindrical bore evacuator at the front, and it was the first Soviet tank to have infrared night vision capability. It was used by both Egypt and Syria in the Six Day War (1967) and Yom Kippur War (1973).