Quote:
Originally Posted by Cwall12345
My first and only Rolex is a 2023 Sub Date. There are lots of things I love about it. But it is not nearly as accurate as my Tudor watches.
This watch is losing about 6 seconds per day on the wrist. When I set it down at night, it usually gains back a couple seconds.
I had sent it to Rolex for a service as it had started losing and gaining time erratically, about 8 seconds per day. I just got it back and it is better but it is not +- 2 secs/day.
Any suggestions or is this par for the course?
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Although Rolex tests now to a precision of -2+6 seconds in a controlled environment and it passes at time of testing.This dont mean it will perform exactly the same every day,as on the wrist there are many variables'. The escapement of a mechanical watch pushes the gears 432,000 times a day.And a day has 86,400 seconds,the bare uncased movements are still tested at the COSC to a average of -4+6 seconds. And in the first ten days of testing could vary by up to ten seconds on any single day and still pass this test. This is still very high precision, given the fact that the movement is constantly affected by the earth's gravity, metal expansion and contraction,mainspring power-reserve, temperature variations, subtle changes in lubrication and friction,owners wearing habits, shocks, and so on.The fact is that no mechanical watch made will keep 100% perfect time, very close yes but perfect no.And if any mechanical watch performs consistently inside or slightly outside the COSC spec of AVERAGE -4+6 seconds a day don't think anyone could ask anymore from any purely mechanical watch
And any modern day wristwatch chronometers are, by the almost 320 year old 18th century navigational standards imposed on John Harrison,H4 watch,quite laughably inaccurate even by today's standards.How about just 5 seconds slow after 63 days at sea,in one of the toughest environments known to man, not bad for a almost 320 year old watch.Now in those days no modern machinery no computer designs no robots,just his bare hands and crude tools.
So next time when you look at your watch and only a few seconds out it wont feel so bad.