Oh, I didn't pay attention to your Location. Guess reading Chinese shouldn't be a challenge for you.
Shenzhen must have an abundance of these toys. You are in a good place.
I thought for a moment that Old_Sev means Old_Servo, especially that they have a pair of them written right next to the servos. But they sure have an interesting way of coming up with abbrev.
When you get a chance, could you post pics of these different servos?