Miyota Caliber 9100

Miyota Caliber 9100

Miyota Caliber 9100

Manufacturer Miyota
Caliber Number 9100
Movement Type Automatic, self-winding mechanical
Lignes 13.5”’
Diameter
30.2mm
Height 5.52mm
Jewels 26
Vibrations Per Hour
28,800 bph (4Hz)
Lift Angle
51 degrees
Power Reserve
40 hours
Anti-Shock System Parashock
Winding Direction
Uni-directional (clockwise)
Hand Windable?
Yes
Stem 065-A05 (tap 10)
Plastic Movement Holder 500-002
Dial Screws 924-752
Hands Count
7
Hand Sizes
1.52mm / 1.0mm / 0.17mm
Hacking Seconds?
Yes
Functions Central hours; central minutes; central sweeping seconds; 24 hour subdial; day subdial; month subdial; date window at 4:30; power reserve indicator at 12:00
Country of Manufacture Japan
Known Models Detomaso Forza XXL, TW Steel CEO Tech, too many to list (Add yours in the comments below…)

The Miyota caliber 9100 is from the 9100 family with other calibers based off of this one. Miyota is owned by Citizen Watch.

Miyota 9100 Family:

  • 9100 – Hours, minutes, central sweep seconds, 24 hour subdial at 6:00, day of the week subdial at 9:00, month subdial at 3:00 (set with the pusher at 2:00), date window at 5:00, power reserve indicator at 12:00
  • 9110 – Hours, minutes, central sweep seconds, 24 hour subdial at 6:00, day of the week subdial at 9:00, date window at 3:00, power reserve indicator at 12:00
  • 9120 – Hours, minutes, central sweep seconds, 24 hour subdial at 6:00, day of the week subdial at 9:00, month subdial at 3:00 (set with the pusher at 2:00), date window at 5:00
  • 9122 – Hours, minutes, central sweep seconds, day of the week subdial at 9:00, month subdial at 3:00 (set with the pusher at 2:00), date window at 6:00
  • 9130 – Hours, minutes, central sweep seconds, date window at 6:00, power reserve indicator at 12:00
  • 9132 – Hours, minutes, central sweep seconds, 24 hour subdial at 6:00, date window at 3:00, power reserve indicator at 12:00

Accuracy:

Miyota claims that the caliber 9100 offers accuracy of -10 ~ +30 seconds per day. This is measured within 10-60 minutes from a full wind via the crown. To fully wind the movement, turn the crown 40 times. The winding direction of the rotor is counterclockwise. A fully wound mainspring will give the watch about 40 hours of running time.

Replacement Prices:

Replacement prices were found online for $136.95.

Image Gallery:

Examples of watches with caliber 9100:

The photos in this listing are of a caliber 9100 found in this Detomaso Forza XXL Blackout. Some other watches with this movement:

Additional Resources:

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Abu Galib
Abu Galib
5 years ago

so which economy range claiber is proving to be most precise?

Vincent
Vincent
5 years ago

My 9100 is by far the most accurate in my collection. Less than 2s per day.

Vincent
Vincent
5 years ago
Reply to  Vincent

And I got seikos, Swiss 2824, Orient, seagulls.

cristian
cristian
5 years ago
Reply to  Vincent

that can simply mean that the one with 9100 is the most calibrated

T
T
4 years ago
Reply to  Vincent

What watch do you have with this movment

Jack Wright
Jack Wright
4 years ago

I have 2 Android/Aragon watches with the Miyota 9100 movement. And I also have an accuracy of 2 secs per day, I take them off at nighttime leave dial up. Had them both for 7 years.

Vince Lewis
Vince Lewis
4 years ago
Reply to  Jack Wright

That’s nice to know Jack considering I’ve just bought an Aragon red dial. My Orient Mako III was gaining 1 sec/4 hours but made a compass needle go haywire, have just degaussed it so hopefully, no adjustment needed. I hope the Aragon has same accuracy as yours.

Wayne Smoody
Wayne Smoody
4 years ago
Reply to  Vince Lewis

What is the meaning of “degaussed it” anyway? Thx

Paul Munoz
Paul Munoz
3 years ago
Reply to  Wayne Smoody

it means to demagnetize it is something that those of us from the 80s and early ninety’s also had to do to our 250 lb crt TV’s when color got messed up from us kids sticking magnets to the TVs to make rainbows PS my dad was pissed at me but luckily he had a friend that had a degausser for TV’s and promptly whooped my ass and then fixed his tv i never did it again

Mike
Mike
1 year ago
Reply to  Paul Munoz

Literally LOL. Great recap

Vince Lewis
Vince Lewis
4 years ago

I have a Miyota cal 9100 in my Pierre Petit and it kept good time for about 6 months but then started gaining. Also, the rotor doesn’t wind up the movement anymore, I can only do it on the crown? The watch sometimes unwinds all power from the mainspring when I pull the crown out? So it needs a service! So some peculiar anomalies present with the movement in my Pierre Petit watch. I’ve just bought an Aragon 9100 online, hoping it will be fine, love all the complications in a divers watch plus got to love that power-reserve.

Luke
Luke
4 years ago

Just bought a Bulova 96C142 with the Miyota 9110. The accuracy is impressive for a watch that costs under €500 and comes with power reserve indicator, weekday and date display. In the 4 days I’ve been timing it, it’s only gained 5 seconds compared to the online atomic time reference (I use time.is). I found out that mine runs -15s/d slow if the power reserve is extremely low (less than 5 hours). With sufficient power reserve it loses about 2 seconds per day when worn, and if I leave it dial-up when I sleep it gains 5 seconds in 8… Read more »

Luke
Luke
4 years ago
Reply to  calibercorner

Welcome, I also submitted some pics but they don’t seem to have been accepted yet?

Joseph Buhagiar
Joseph Buhagiar
2 years ago
Reply to  Luke

Luke I was not going to comment but what you say is to a large degree correct. I am 70 now – From the age of 25 I always had an Omega. I loved the prestige of wearing mechanical on my wrist. I starting with seamaster in 85 speedmaster around 95 and another speedmaster in 2005. In between I always eventually changed to buying a seiko since non of these omega watches proved reliable – and certainly lack the accuracy one would expect from an omega and their price tag. So in 2010 I gave up Omega. Based on my… Read more »

Luke
Luke
2 years ago

Hey Joseph, judging by your surname I strongly suspect you hail from the same island as I do. I saw a 96C143 for sale at Sterling Jewellers for 600 euro back when I was looking for an engagement watch for myself (who knows, maybe the one you bought was the same model I saw? It was the only one in stock at the time). Bulova have three similar ones – 96C141 is white, 96C142 is blue, and 96C143 is grey. All with the Miyota 9110 movement. My 96C142 is still my best mechanical watch – and I’ve bought others since… Read more »

Joseph Buhagiar
Joseph Buhagiar
2 years ago
Reply to  Luke

Luke what a coincidence LOL We say Malta is small. The whole world is getting smaller. Yes I bought it from Sterling – the only mechanical Bulova they had and it is the same one. I had offered around 500 (I think 480) and they agreed to sell. A day ago I said in my mail – at exactly 7.40.00 on my mobile – the Bulova read 7.38.55. I have just checked it today at 7.40 again and it was 7.39.02 Any way what I can say is that the variance the plus and the minus are cancelling themselves out… Read more »

Jon Hutto
Jon Hutto
4 years ago

I got a Villandry ACIER NOIR ET BLANC 85089_3A_F using the Miyota 9122. First couple weeks it was off by about +6 seconds a day. Since then it settled down to about 2 seconds a week. I guess there was a break-in period.. Only negative is I can sometimes feel the wheel spin.

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[…] the heart of the REC 901 series is an automatic Miyota 9100. It’s a well-respected movement amongst enthusiasts as an alternative to the much more expensive Swiss ETA […]

Mic
Mic
2 years ago

Bulova lists a watch with the Miyota 9110, 26 jewel movement. Is this a similar movement of like quality as the 9100?

Luke
Luke
2 years ago
Reply to  Mic

They’re all the same family. The 9100 has all the features. The 9110 just lacks the month indicator but keeps the power reserve indicator, 24h indicator, day ring and date display.

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Jmag
Jmag
1 year ago

I absolutely love the Miyota 9100! I have 3 Aragon Divemaster watches with it and they’re all very dependable and accurate. Seconds hand is very smooth!

David A.
David A.
9 months ago

Is there any Info about how magnetic fields affect this movement? In our modern world this is more and more Important for a mechanical watch IMO

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