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impalla62ss
·I just got a watch back from service. IWC cal. 401 from the '50s. It is within spec on timekeeping, but the Amplitude seems low at 220. Should I be concerned?
Edited:
Amplitude seems low on a serviced watch.
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Fallout Boy
·As I learned: depends on rate of winding (full - low), position of the watch....
https://omegaforums.net/threads/tim...n-open-for-all-inquiries.167077/#post-2276777
https://omegaforums.net/threads/tim...n-open-for-all-inquiries.167077/#post-2276777
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impalla62ss
·Face up, full wind
Face up, Full wind. Amplitude is consistently low in other positions. I'll check out the link.
As I learned: depends on rate of winding (full - low), position of the watch....
https://omegaforums.net/threads/tim...n-open-for-all-inquiries.167077/#post-2276777
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Fallout Boy
·We better wait for the pro´s 😀
Are there reference-values ?
Are there reference-values ?
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impalla62ss
·Found this thread. https://omegaforums.net/threads/amplitude-debate.78234/ good info.
I am unable to find reference values on the web.
I am unable to find reference values on the web.
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lejaune
·The lift angle of cal. 401 is 56 degrees, so the actual amplitude is 7.7% higher than you measured.
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Canuck
·I get the feeling most collectors would enjoy their watches more if they didn’t have a timing machine! 😉
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p4ul
·or mowing machines.
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Dan S
·I just got a watch back from service. IWC cal. 401 from the '50s. It is within spec on timekeeping, but the Amplitude seems low at 220. Should I be concerned?
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impalla62ss
·Thanks for all the help. I’ll reset the lift angle.
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impalla62ss
·Here it is with the correct lift angle. Amplitude seems pretty low for a serviced watch.
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Canuck
·With a pattern as scattered as that one is, you might consider checking with who it was that did the job, and asking them why it shows rather poorly. The watch could be 65 years old, and perhaps it has been over the road, and you may have to keep your expectations in check.
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impalla62ss
·With a pattern as scattered as that one is, you might consider checking with who it was that did the job, and asking them why it shows rather poorly. The watch could be 65 years old, and perhaps it has been over the road, and you may have to keep your expectations in check.
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ansoa-66
·I don't consider the amplitude to be low for a 50's watch that had no parts swapped.
What I find interesting is the pattern of the reading. That doesn't look like the watch was particularly good serviced or some parts have defects.
What I find interesting is the pattern of the reading. That doesn't look like the watch was particularly good serviced or some parts have defects.
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khangct
·To me, that amplitude is acceptable for 50s watch.
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impalla62ss
·
The watch got a new mainspring. For a $800 service I expect new parts if needed for cost, I could of had a clean for $300. I'll hear back from them after the holiday. I know it is an old watch but the IWC Cal. 401 is a good movement, and should perform better than this.
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lejaune
·If things remain the same, increasing the lift angle setting should increase the amplitude as a result, and should not affect the rate. Something else is in play here, it seems.
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kaplan
·For $800 it is very low
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Kwijibo
·it could be many things but with a new mainspring ... rather low. how is the +/- delta?
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Dan S
·Weird how the timekeeping is wandering around so much. I don’t usually see that on a watch that has been serviced unless maybe you changes the position.
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