What would affect daily accuracy? UPDATE

An increase in temp in theory would cause it to lose, not gain. If the watch is on your wrist most of the time the temp is less of a factor. If I had to guess the biggest factor is a slight change in your daily habits with a new house, job, commute, hours kept, etc. I have some watches if I get up, work the same hours, and go to bed at the same will be at about 0 to +2 sec/day. If I have a day off sleep in and don't wind it till later in the day I may find it has gained 5 or 10 seconds. So the state of wind and positonal variation are probably responsible.

If it bothers you that much you can have it regulated to shave 5 seconds from the daily run time. A movement should be regulated to accomodate your daily routine, not sitting dial up on a desk.

Thanks, I agree with your assertions.

As a quick update, not wearing the watch for 6 days, winding roughly the same time every day, it gained at a rate of 1.8s per day. I wore in on my wrist for approx. 11 hours and it gained over 5 seconds!

I'm still cursing the fact I banged it on a doorframe as soon as I got here - I really wish I could discount that event with some confidence.

What I think I will do is as was suggested earlier in the thread - wait til I get back to the UK and see if it reverts to 2-3spd. If it doesn't and is still running fast, I will take it back to the AD I bought it from and see if they can regulate it. I'm pretty sure they have a watchmaker instore, however I am not sure if when they say 'watch repairs', they really just mean 'we change batteries and straps'. I'm guessing as it is an AD my warranty wouldn't be voided? Omega have already had the caseback off once so the red dot etc has gone.

I don't know how long you have owned it, but it's possible that it is just time for a service. As the oil dries up and begins to thicken the rate can increase. Also, although modern watches are much less prone to becoming magnetized, this could still be a possibility. I often find that when I demagnetize my watches, several seconds can be shaved off the daily rate. However most of mine are from 1940-1960.

You'd have to ask Al to be sure but remember that most irregularities appied to your watch will cause it to gain. No surprise when it's in your drawer (what's a "draw"?) that it will run a litle better because you're not wearing it.

Tom

Sorry, I did mean drawer, but this crappy iPad keyboard got the better of me!

It definitely doesn't need a service, as its only 6 months old. I also don't think it's magnetised as it would be running at a constantly much faster rate (or so I believe).

I'm trying just to use it and not worry too much while I'm out here, hoping it reverts to its old rate when back in the UK. If not, I'll look into getting it regulated.

So, I've been back in the UK for a couple of weeks now. Using the watch every day, doing all the same stuff. Here's the result of nearly 12 days...

An average rate of 1.2spd!! A little blip early on, and again at the end mess the graph up slightly. With my job, my shifts times and actual work is anything but routine, so it's rested, worn and wound at slightly different times every day.

I'm amazed at the difference, considering it was at a constant +4.5spd just a couple of weeks ago over the other side of the Atlantic. I'm going back there for a week or so in a few weeks so a further definitive test will come!

I just found your post, and here you have the answer; geographical variances (no matter what they are - I don't really care) affected its accuracy.

In the beginning I doubt that door bang caused any damage, unless it is sapphire shattering. Modern wrist watches are made to withstand daily activities, if otherwise there will be words of caution printed all over the manual.
The internal mechanisms can work their way through a disturbance, though some times may take a day or more longer to return back to working accuracy.

From my experience, my newly serviced IWC exhibit zero deviation sitting a drawer fully wound and loses -2s/24 hours when worn.
Rolex SeaDweller was +3 no mater what I throw at it or not.
My 2011 Moonwatch 3570 loses -8.5s/24 hours when worn, -6s/24 hours sleeping in the drawer. Then I experiment for it to completely run down with the chronograph on, restarted the watch and it's been exact zero while in the drawer and -2.5s/24hours when worn. I thought the watch should be running fast, but mine runs slow and slower while worn, this itself has bothered me before, but it has become a hobby of mine.
Mechanical watches are like women , sometimes there are no logical reasoning.

I am training them like an athlete, resting and pushing the movements.
So far I am very happy with the results.

So, it's been a while now since I contributed to this thread.

In the intervening period, I've largely been in the UK, with the watch performing well, at about +1.5-2spd. I spent a week back in Vegas and it went to around +4-6spd. It was consistently around 40C and with the other environmental changes, I was happy with that.

However, I have now headed East, to a location where its never below 30C and reaching 50C during the day. However, everywhere is air-conditioned, so the temperature changes are quite drastic. I'm also on quite a random scheduke at the moment, which should hopefully calm down soon. However, my Speedy has been running at between +14-16spd over the last 6 days or so!!! This seems to be excessive variation, and obviously outside of the specs. I'm wondering if just leaving it on my bedside table, in my air-conditioned room, winding at the same time every 24hr will help me get a reliable baseline for how its doing out here? As was mentioned above, it's no good being accurate on the desk and not my wrist though, so I'm wondering what my options would be after that.