My wife has a 6517 from 1966, it belonged to my mother. It stopped working completely once. Rolex told me they won't repair these vintage watches. I found a independant rolex watchsmith and the watch is running perfectly again. My wife loves it, I just have to get a new bracelet...the old jubilee has A LOT of stretch...
I think I registered ages ago but never had the money to buy a watch, well, that has changed and the info here is great :-)
Looking forward getting a nice one soon :-)