Real or fake? Help please

[justatxn]

Could anyone tell me what you think about this watch. I found it at an estate sale about 12 years ago. It says "ROLEX" and has the five point crown on the face of the watch. It looks as though there may be numbers or something written under the 6 o'clock position but I do not have a magnifier and I cannot make it out without one. The watch looks as though it could be removed from the band and the band could be worn as a bracelet. On the back it has the five point crown as well as "MODELE DEPOSE 451***".
The clasp has a crown emblem on it that has only four points. and on the back of the clasp it has 18k written on it though it looks like it was written and not stamped. It also has two other things stamped on the back of the clasp. One stamp looks as though it reads "K 8" but I am not sure if it is an "8". The other stamp I cannot make out at all. I tried to attach pictures so you can see as well. The watch looks a little oranged in the picture but it is a white gold color.