With the release of Update 1.28.1, the AMX ELC 901 ( France, Tier VI Light Tank, Promotional) will be tested by developers and supertesters in random battles.
Historical Reference:
The ELC AMX-901 was the first prototype developed under the Engin Léger de Combat (Light Combat Vehicle) program. In 1955, it underwent testing, which revealed numerous design flaws.
An improved version, the AMX ELC 90 bis, was extensively redesigned to address these issues. It differed significantly from the original prototype and effectively became a new vehicle.
It needs that 170 prem pen.. If anything it needs 210 premium pen