Difference between Early and Late model: BNR34 window mold retainer

Have  you watched detective series called “Aibou”? It is like “Monk” ( American comedy ), the police inspector called “Ukyo Sugishita” is a unique and highly observant person. He noticed very small difference and always solves cases. Our CEO loves this TV drama. So, this time, he stick to the very small difference of retainer …