The center cartridge of the turbo has a plate with a part number engraved on it. 14411-1E001 in my case. (i was hoping for 14411-Wxxxx which would be the ball-bearing W11 motorset, but i wasnt fortunate enough to score one) Its just a number i used to identify the motor when i went down to the importers warehouse to choose my motor.
EX:
EX: