gen crystal for TC Sub

[jack218 1]

Hello,

I have tc sub v6. looking for a gen rolex crystal. someone offered me a used crystal- B25-295-C1. 

it will fit to the sub? 

whats indicate the B at the begining of the model? as well i see there are c1 and c2 modles.  whats the difference? 

I want to make sure i buy the right model. 

 

Thanks