It was spotted on the RU server, played by an WG Supertester, also the stats of the tank changed drastically with improved armor and bigger damage gun:
New stats with 100% crew (the stats in the bracket are old stats):
Tier: 8
Hitpoints: 1500
Engine Power: 700
Weight: 51.2 (51.1) ton
Power-to-Weight:13.67 (13.59) hp/t
Maximum speed: 35kph (for.)/ 14kph (rev.)
Hull Traverse: 30° (26°)/sec
Turret Traverse: 25°/sec
Terrain Resistance: 1,151/1,438/2,205
Viewrange: 350m
Radio range: 440m
Hull armor: 130(90)/100 (90)/90mm
Turret armor: 250/150/100mm
Gun: 122mm BL-13
Damage: 440 (390)/440 (390)/530
Penetration: 225/265/68mm
DPM: 1720.41(1834.8)
ROF: 3.91(4.705) round/min
Reload: 15.34 (12.753) sec.
Accuracy: 0.42 (0.403)
Aim Time: 3.07 (2.88) sec.
Elevation/Depression: +20°/-6°(-5°)
Thanks to Cutmeo88 for the email.