Here is my theory,

[TheVTCGuy]

I have owned two turtles over the last six months, one was the standard and the other a “save the Ocean” blue face. I had the black one, and it was awesome, but when I saw that blue dial... bought it on the spot at an AD. Absolutely love it!

Now, I have a Ben Bridge Winder, which I keep my Rolex on when I am wearing the Seiko. I have never had an issue, the DJ 41 keeps excellent time whether on my wrist or just being taken off the winder. HOWEVER, the Seiko has a major issue (Twice) with being put on the same winder! BOTH watches, after putting them on the winder (generally, over several weeks or months on and off of it) the timing became terrible. The first one I had serviced and then when I bought the new one, I noticed the exact same phenomenon, after spending time on the winder it would gradually get more and more inaccurate. I had to have both serviced and as long as I keep them off that winder, (i.e. let them run down and reset and re-wind) they remain accurate.

On to my theory, I submit the Seiko, does not have the same... “shielding? as a Rolex, and is more susceptible to the electro magnetic energy that a winder (or any electronic device really) puts out. I know this is an extremely small amount, and BB winders are not the equivalent of say, a Wolf, but the Rolex remains constant where my Seikos lose accuracy rather quickly if they spend any time on it. That’s the only reason I can deduce, the Rolex has a better anti-magnetic “shield”

Do you accept this hypotheses? Does it make sense?

[TheVTCGuy]

Almost forgot the required wrist shot!

[imperio]

I submit an alternative hypothesis and that is that Rolex watches are meant to stay on winders while Seiko watches are to stay on our wrists

[WS9D]

I have 5 turtles and one samurai now. I turned into a bit of a Seiko addict this year. What I have noticed is on the wrist, they are very consistent. My worst one is +7 a day consistently. Once I take them off, set them down, put them in the case, they become pretty inaccurate. Left my Padi Pepsi on the desk the other day while I sized and wore my new Great White. The Pepsi gained 15 seconds in 6 hours sitting there.

Maybe they really do like to be worn, or Seiko has solved some magical mystery to regulate them based on being worn lol


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[1William]

Maybe. I have found that worn my Seiko watches keep good time. In the draw, not so much.

[Dubshack]

Originally Posted by 1William

Maybe. I have found that worn my Seiko watches keep good time. In the draw, not so much.

Originally Posted by Ks6pd

I have 5 turtles and one samurai now. I turned into a bit of a Seiko addict this year. What I have noticed is on the wrist, they are very consistent. My worst one is +7 a day consistently. Once I take them off, set them down, put them in the case, they become pretty inaccurate. Left my Padi Pepsi on the desk the other day while I sized and wore my new Great White. The Pepsi gained 15 seconds in 6 hours sitting there.

Maybe they really do like to be worn, or Seiko has solved some magical mystery to regulate them based on being worn lol


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Interesting. Same as these two for me.


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[77T]

Paul, does your BB winder have an adjustable rotation count? That is, the rate at which it rotates clock wise and counter-clockwise.

Your seiko movement’s spring is perhaps longer than your Rolex and may require more rotations and maybe only auto winds in one direction.

As for magnetization, the weak EMI force from the small motor is not likely to be the issue or you’d see some wild variations.


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[antbkny]

Not sure about all seiko movements, but the 4r36’s I have vary in timekeeping. Depending on where it is in the power reserve and positioning. There’s an App called Lepsi that you can install on your iPhone and it will tell you if your watch is magnetized. Not sure if it works with any other type of smartphone though.

[scarlet knight]

I set the time and wear them. I find my Seikos as accurate as my higher cost watches, but I am not one to check them to the second.

[ArtNouveau]

Interesting, I tried a couple of my Turtles on my single Wolf winder and they flatout didn’t work. My winder was a gift with Rolex purchase and to be honest I’ve never read the instructions to see if it’s adjustable.

[antbkny]

According to this, the winder setting for turtles is clockwise, 650 turns per day
https://watch-winder.store/watch-winding-table/seiko/

[pickettt]

My experience counters your theory, though there are some variables so it’s not conclusive . I’ve got a mini turtle that keeps near perfect time on the winder, day after day. When I put it on my wrist, it’s +\- 3s/day. So, it keeps better time on the winder. However, that could be due to the amount of winding, and it can be due to positioning. [L

[pickettt]

Originally Posted by scarlet knight

I set the time and wear them. I find my Seikos as accurate as my higher cost watches, but I am not one to check them to the second.

Same here, with the exception of Spring Drives. Nothing exclusively mechanical compares.