Yeah, you read that right.
T54E2 (No oscillating turret)
The T54 was a series of prototype tanks of the 1950s. Three tanks were built with different turrets and a 105 mm gun, were mounted on the M48 Patton chassis. The original T54 had a conventional turret with an autoloader, while the turret on T54E1 was of an oscillating design with an autoloader and the one on T54E2 was conventional with a human loader. The turret on T54E1 was similar to that of the T69 in its oscillating design and in that it held a crew of three and a nine-round drum autoloader under the gun.