Can anyone tell me if my Rolex is fake?

[Razvan1985]

I have recived as a gift, an old Rolex. And i would like to know if it'a fake or not. I think it has around 40-50 years.
It a Rolex Oyster Perpetial Precision. At leest that's what's written on the front of it.
Inside on the movement it has a serial: 87123, and inside the back it's 6350 and 6352.
Thank's an advance!