miyota 9015 AUTOMATIC MOVEMENT

[elliottest]

This is my first Miyota movement and i read somewhere how to regulate the movement by leaving the watch in various positions. My recently purchased Borialis Sea Dragon out of the box is + 8 /day, which ok by me but i thought i have a go at making it loose a bit of time through the night.
With crown up + 3, with crown down + 4, with watch flat [ face up ] + 5.
i will try face down tonite.
So far over 4 days its gained + 29 sec [ + 9.25 / day ]
Don't get me wrong , id rather a daily gain then loss anyway.
What's everyone else experience so far with their new Miyota 9015 movement for best position.

 

[ChuckW]

+29 seconds over 4 days would be +7.25 seconds per day.

 

[elliottest]

+29 seconds over 4 days would be +7.25 seconds per day.

Good point, im blaming my typing haha, better then i thought.

 

[CHANT]

This is my first Miyota movement and i read somewhere how to regulate the movement by leaving the watch in various positions. My recently purchased Borialis Sea Dragon out of the box is + 8 /day, which ok by me but i thought i have a go at making it loose a bit of time through the night.
With crown up + 3, with crown down + 4, with watch flat [ face up ] + 5.
i will try face down tonite.
So far over 4 days its gained + 29 sec [ + 9.25 / day ]
Don't get me wrong , id rather a daily gain then loss anyway.
What's everyone else experience so far with their new Miyota 9015 movement for best position.

Currently, I have 2 automatics with the Miyota 9015 calibre: (1) The Dagaz - Aurora, and (2) The Citizen Grand Touring (which actually has the 9012 calibre).

When the Aurora was brand new about a new ago, it gained about 3.5 sec/d. Of late, it seems to be gaining about 10 to 12 sec/d. I am not sure why it is doing that! Hopefully, it would settle back down to under +10 sec/d. We'll see! The various at-rest positions on my night table did not seem to vary the daily gain/loss rate by any more than a couple of seconds.

As for the Citizen G.T., when it was brand new, it was almost "dead on". Now, after more than one year of "on and off" wear, it seems to be settling in at +3 sec/d with the 12 0'clock index in the up position. I have nothing to complain about its accuracy which is well within COSC spec.

I still have not managed to find out more about the 9012 movement. Is it the new and improved version of the 9015? Anyone care to chime in?!

It is my hope that my white-faced Scorpionfish could do +8 sec/d or better. It won't take long for me to find out now as the first batch of Scorpionfish has just arrived from the factory.......
I will let you know. Stay tuned!

Just couldn't wait!

Cheers!

Chant

 

[Jamania]

Waiting for u review then... with all due respect !

 

[Pakz]

Until my SeaDragon, all my watches with 9015 movements have been within -2s/+7s a day, and quite stable. So it is one of he few movements I've never even tried to regulate myself.
The SeaDragon was rather too fast for me when I got it, +15 to +20s a day the first few days. Being away from home at the moment, I didn't do anything and just wore it the way it was. Now, about 2 weeks after having put it on the wrist for the first time, it seems to have settled down to about +7s a day which is fine for me, borderline but fine.

Generally speaking, it is a movement that tends to be quite stable, with little day to day and positional variance, and has a great reputation for being quite robust and problem free.

The 9012, from what I understood is the version of the 9015 that Citizen use themselves and essentially differs in having the generic-plane-jane rotor replaced by a more ornate Citizen branded one. So about the same thing as the 9015, even if they possibly regulate better those they keep for themselves than those they sell to third party makers.

 

[elliottest]

Until my SeaDragon, all my watches with 9015 movements have been within -2s/+7s a day, and quite stable. So it is one of he few movements I've never even tried to regulate myself.
The SeaDragon was rather too fast for me when I got it, +15 to +20s a day the first few days. Being away from home at the moment, I didn't do anything and just wore it the way it was. Now, about 2 weeks after having put it on the wrist for the first time, it seems to have settled down to about +7s a day which is fine for me, borderline but fine.

Generally speaking, it is a movement that tends to be quite stable, with little day to day and positional variance, and has a great reputation for being quite robust and problem free.

The 9012, from what I understood is the version of the 9015 that Citizen use themselves and essentially differs in having the generic-plane-jane rotor replaced by a more ornate Citizen branded one. So about the same thing as the 9015, even if they possibly regulate better those they keep for themselves than those they sell to third party makers.

Over the 7 days, with crown up at night, mine has averaged +7.25 s a day, not bad at all.

 

[CHANT]

Over the 7 days, with crown up at night, mine has averaged +7.25 s a day, not bad at all.

Since my last message the Miyota 9015 movement in my Dagaz Aurora, I had it regulated and I am glad to report that it has gained a total of 2.5 seconds over the last three days. Needless to say that I am very pleased with the result. As a matter of fact, I worn it just yesterday on the treadmill for about 45 minutes and it had gained only 0.5 second for that duration which I find nothing short of amazing. My SARB-033 gained about 4 seconds and SKX-007 (now deceased) gained about 9 seconds when being subjected to the same treatment. As such, I second Pakz's comments that the 9015 movement has little day to day and positional variance.

My white Plongeur SF left Portugal two days ago and would likely be delivered by the middle of next week.

I am so looking forward to having it on my right wrist.....

CHANT

 

[CHANT]

Waiting for u review then... with all due respect !

Okay folks, my White/Plongeur SF had finally arrived two evenings ago. It has gained exactly 16 seconds over the last 48 hours with the watch laid on my night table with the 12 o'clock index in the up-position, both nights. Well, +8 sec/d is not exactly what I would call "regulated" accuracy. A competent watch smith could certainly get this 9015 calibre regulated (in three positions) to within +3 sec/d. Not too often would a watch smith regulate a watch to "dead-on" accuracy because it is a know fact that as time goes by all movements will run slower and slower, and eventually require an overhaul!

I will wear my SF for the next two to three weeks and keep forum members updated if it would settle down to less than +8 sec/d. Stay tuned!

CHANT

 

[ChuckW]

My white plonguer has been running +14 seconds per day. While within movement specs, it is the least accurate watch with the 9015 I've owned.

 

[CHANT]

My white plonguer has been running +14 seconds per day. While within movement specs, it is the least accurate watch with the 9015 I've owned.

ChuckW,

My SF is now at +60 seconds since I zeroed it against my atomic wall clock exactly 7 days ago. This works out to be +8.6 sec./d which makes it on the border line of being acceptable. But I would probably leave mind alone for the time being.

The +14 sec/d would definitely border me a lot. My suggestion to you is, assuming you don't already have a watch smith whom you could trust, to take your SF to a watch smith to have it regulated to within +3 to +4 seconds per day. Good luck!

CHANT

 

[Pakz]

Thing is, waiting and wearing them might in some occasions make the movement settle in.

My Sea Dragon was about 20s fast a day at first, then progressively slowed down to a much more acceptable 7s a day. Then the Scorpionfish came (and it's +2s a day, but was about -2s at first). I'll probably wear it again soon and see how it fares now...

 

[CHANT]

Thing is, waiting and wearing them might in some occasions make the movement settle in.

My Sea Dragon was about 20s fast a day at first, then progressively slowed down to a much more acceptable 7s a day. Then the Scorpionfish came (and it's +2s a day, but was about -2s at first). I'll probably wear it again soon and see how it fares now...

Pakz,

Wow! +2 s/d is awesome! A lot of the lower grade ETA-2824s cannot keep time like yours!

Perhaps it does take a new movement a certain period of time to "break in"! I will continue to monitor mine and share with forum members occasionally.

Thanks

CHANT

 

[Pakz]

So I got the SeaDragon out of the box again this Friday... And lo and behold, it's actually gained close to 15s on the first 24 hours. So not back to it's original very bad results, but not as good as I had it to be during the first time I wore it. Now, that first time was during a very hot period of my holidays. So hot that I actually did very little but have drinks in the shade, read books and an occasional dip in a pool. So quite a bit less activity than usual, and maybe that was affecting the timing.

Well, anyway, I could accept +20s during the holidays but now that I'm back home with my tools, those 15s did itch. So I decided to regulate the watch. Opened it, had multiple trial/errors/checks of the rackett position under my 10x magnifier... And by 16h20 Sunday afternoon I though I had found a "correct spot". Indeed, ever since the watch has gained about 1.5s. Yeah, one and a half second over 30h. Most of it acquired during the night when I let it on the nightstand with 12h up. I'll try and see tonight (and possibly on later nights) if I can get it to be at 0s a day by "positional regulation at night".

Overall, it more than confirms my previous impression on the 9015, it's a great time keeper in general, and it can be regulated rather easily (because of its superb stability... something lower end Seiko movements cannot say).

 

[CHANT]

So I got the SeaDragon out of the box again this Friday... And lo and behold, it's actually gained close to 15s on the first 24 hours. So not back to it's original very bad results, but not as good as I had it to be during the first time I wore it. Now, that first time was during a very hot period of my holidays. So hot that I actually did very little but have drinks in the shade, read books and an occasional dip in a pool. So quite a bit less activity than usual, and maybe that was affecting the timing.

Well, anyway, I could accept +20s during the holidays but now that I'm back home with my tools, those 15s did itch. So I decided to regulate the watch. Opened it, had multiple trial/errors/checks of the rackett position under my 10x magnifier... And by 16h20 Sunday afternoon I though I had found a "correct spot". Indeed, ever since the watch has gained about 1.5s. Yeah, one and a half second over 30h. Most of it acquired during the night when I let it on the nightstand with 12h up. I'll try and see tonight (and possibly on later nights) if I can get it to be at 0s a day by "positional regulation at night".

Overall, it more than confirms my previous impression on the 9015, it's a great time keeper in general, and it can be regulated rather easily (because of its superb stability... something lower end Seiko movements cannot say).

Wow! 1.5 seconds over a 30-hour period is fantastic. Great job!

There is no point in regulating the movement to any closer to "dead on" because, through time, all movements will tend to slow down which tells the owner that it is time to give it an overhaul.....

There is a timing machine at the Dagaz website selling for about $255. I would have bought one if the price had been around $150. Having such a machine at my disposal would save me time and money to have my automatics regulated by a watch smith. A friend watch smith would get it done for you straight away, but most places would make you leave your watch there for days and charge you $50 to $60 for the service.

I will look for a timing machine at e-bay and if I could get a better deal.

CHANT

 

[Pakz]

Movements getting old can also speed up significantly. That's a thing that happened to my Speedmaster... Initially was about +3s a day, then after about 6 or 7 years of almost continuous use, it sped up progressively, until it was like +20s.

Anyway, I'd like a timing machine, as it would speed up the process, particularly for watches with racket levers and no screws for the adjustment (like most Japanese movements). But still you can manage very well with trial and error, usually. My SeaDragon has lost 3s during the night standing crown up. So I guess standing 12h up or flat would be the best "night position" to really be about spot on overall.

 

[CHANT]

Movements getting old can also speed up significantly. That's a thing that happened to my Speedmaster... Initially was about +3s a day, then after about 6 or 7 years of almost continuous use, it sped up progressively, until it was like +20s.

Anyway, I'd like a timing machine, as it would speed up the process, particularly for watches with racket levers and no screws for the adjustment (like most Japanese movements). But still you can manage very well with trial and error, usually. My SeaDragon has lost 3s during the night standing crown up. So I guess standing 12h up or flat would be the best "night position" to really be about spot on overall.

Pakz,

I have had more or less the same experience with nighttime positions as described in your message as well. Since all my automatics do gain time over the course of several days to be noticeable, I typically place the watch that is on active-duty overnight at my night table in "12 up" position which tend to slow down the movement by a second or two by early next morning.

Yes, I do concur that there may not be a need to get a timing machine because with a steady hand, a person should be able to get it run a little more accurate.

Thanks for sharing your experience with forum members.

CHANT