V brakes stand for vented so either V2 or V4 calipers can take the thicker rotors. That's a V2 rotor, the vented V4 uses the same track depth as all their other rotors whereas the V2 was quite a bit deeper. The Moto badging means it was from the '07/08 run with the older, larger Moto lever that was available before the Tech lever became available and the Moto became the Tech V2.