Maybe he tucked that 2447 away because he preferred using his Mareographe/Chronomatic/Black PVD manual Monaco... etc !

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: so there is a Carrera 2447S (white dial) listed for sale, and I
: call the owner, and I ask him, "When was the watch last
: serviced?", and he says, "I have never had it
: serviced. I bought it in 1964, wore it once in a while for a
: couple of years, and then put it in the drawer. One time, it had
: stopped running, so I took it to a watch store, and the guy
: opened the back, played with it for a minute, and closed it back
: up, and it has run perfectly ever since."

: . . . so then what happened?

: Jeff