The AMX-50 program started in 1945 as a requirement called NOM 141 (Project 141) as a 30 ton weight class medium tank. NOM 141 was to replace the then-new ARL-44 as the next generation of indigenous French tanks, but development was protracted and went through many design iterations. The AMX-50s received their signature oscillating turrets in 1949 as the AMX M4, equipped with a 90 mm cannon which was deemed inadequate by that point which led to an upgunning program. This resulted in two 100 mm equipped AMX-50s being produced, one being a conversion of the AMX M4 and the other being a new vehicle built from the ground up to AMX-50 (TOA100) standard. The AMX-50 (TO90/30) is an AMX-50 with the turret of the Char 25t - developed in 1950 and still retaining the 90 mm gun. An intermediate step, it unfortunately did not make it far into development as the French were looking towards a larger caliber and longer gun - something which eventually led to the development of the AMX-50 Surblinde and AMX-50 Surbaisse.
The AMX-50 (TO90/930) was introduced during Update "Apex Predators" as a reward for Battle Pass: Season X, "Royal Guard". Veterans of the French tree will quickly notice that this vehicle shares a turret with the Char 25t, an extremely potent light tank, which is sure to spark a smile for anyone in the know. The TO90 fires M82 APHE like the Char 25t does, but unlike American M82 fired from the US 90 mm, the French rendition has a longer barrel, meaning they penetrate over 20 mm more armour and break the 200 mm+ threshold in penetration. Alongside the slightly faster shell velocity and 4 second autoloader of the turret and using your extreme mobility you can shred the flanks of an unaware enemy team with ease. The only things to note are your lack of armour against anything above autocannon fire and the fact that too much firing at once can empty your ready racks - if you can compensate for both, this vehicle is a beast that offers one-shot potential unlike any other tank in the tree down to its APHE round with high filler while also being incredibly nimble.