Questions on Rolex identity?

[inderveer02]

My gradfather left me a watch , which i think he purchased for himself in the mid 80's, its looks like a date just and much smaller than my sub. I have listed the model and the serial # and was wondering if anyone could shed some light on it. When i pull the model # online it reads as a quartz movement for rolex however it clearly has a mechanical movement

R380271 model 17014,

cheers

Indy