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I bought a Monster (produced in early 2005) that had not been used for the past year or more. The watch lost about 15 seconds per day so I regulated the movement. In two attempts, I came down to a loss of 1-2 seconds per day over a couple of days and thought I would leave it at that. Just to see how the watch managed over time, I kept it in my watch box running and timed it a couple of times per day. A good week after the final regulation, it looks as if the watch has finally found it´s "pace" at +3 seconds per day.

To the question: Is this normal that the 7S26 movement needs to "settle in" after a regulation ? What are Your experiences ... ?
 

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When you want to regulate a 7S26 you need to wear it and check how it is going.
Roomtemperature is lower as your temperature and this can cause the watch of running slower on the wrist.
If the watch is on your wrist you always have a almost fully winded mainspring, at least if you are a bit active. If you keep it in the box it is not fully wound.
The "running" of the watch is dependend of the mainspring and is not constant untill it stops. It is not even linear.

I have a few watches regulated, they all run in some way, but after they came to a stop, they ran somewhat different.
 

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In my experience, yes. I've also noticed that 7Sxx watches actually take a day or two to settle in if they sit not running for a few months (my 7002 does this, too, and it's one of the more accurate low-end Seikos I've owned). This effect is one good reason to let your watch run 24 hrs. between regulation attempts, to get a better idea of what your adjustment has actually done. And as Luka wrote, you need to wear it as you normally would to get a real idea of how accurately it will run for you while worn.

paul
 

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Luka-San said:
Roomtemperature is lower as your temperature and this can cause the watch of running slower on the wrist.
Interesting theory about temperature affects on the watch movement. Does it make a difference, I wonder, between a thick zulu strap vs. 2-piece? With a watch on a 2-piece strap, the caseback sits directly on the wrist skin. A thick piece of nylon on the zulu strap would separate the skin and the caseback. Would there be a difference in watch accuracy going from the tropics to the Antarctica?
 
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