Help Identifying Watch

[virg]

Help in identifying watch

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Hi everyone,

This is my first post and hope I'm posting it in the right forum.

I've found the forum very interesting and know very little about watches. I have inherited a Rolex watch and would like to find out more about it. I've attached a few pictures; inside the back cover is written:
Brevetee
Rolex S.A.
Geneve Suisse
31 Victoires
Haute Precision
3646
260563
The Body is 47x47mm
The face is 40mm in diameter.

Any information would be really helpful. Is it valuable, should I be keeping it somewhere safe?

Thanks in advance for your help.
Virg