Miyota 8215: specifications and comparison

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The Miyota 8215 is an automatic mechanical movement of Japanese origin, manufactured by Citizen, which, despite its low cost, is one of the most reliable and recognized.

We are talking about a caliber in the Miyota entry-level range that is often used by the micro-brands Invicta, Stuhrling or Festina precisely because it is cheap and easy to get.

In this post, we will analyze each of its features in detail, consider its operating specifications and compare it to other similar movements.

Gigandet G8-005 – men’s watch, black leather strap

  • Citizen-Miyota automatic movement, caliber 8215, with a power reserve of 42 hours
  • Exclusive pilot’s watch in vintage design
  • Good readability even at night
  • Solid stainless steel housing (316L) for the highest requirements
  • Hardened and scratch-resistant mineral glass

✚ Miyota 8215 data sheet

Manufacturer Miyota (citizen)
model 8215
Move Automatically
Jewellery 21st
Vibration frequency 21,600 vph
Energy reserve 42 hours
Dimensions 26mm x 5.67mm (diameter x depth)
precision -20 ~ +40 seconds / day
properties Hours, minutes and seconds on central hands and calendar
Stop seconds (hacking) No
Remonte manual And

✚ Miyota 8215 in detail

The Miyota 8215 is an automatic caliber with a unidirectional rotor with the possibility of manual loading (hand winding), but which does not include hacking or stopping seconds.

This means that it can be charged with both the movement of the wrist and by turning the watch crown, but the second hand cannot stop to set the time more precisely.

That it is unidirectional means that the mechanism can only be charged when the rotor is turning in a certain direction, although this does not have to affect the watch’s energy recovery capacity.

To withstand bumps and drops, the Miyota 8215 includes Parashock, an anti-shock system patented by Citizen like the Diashock in Seiko or Incabloc in the Swiss calibers.

Miyota 8215

➤ Accuracy

According to the manufacturer, the Miyota 8215 moves in a range of -20 ~ +40 seconds per day, a value that may seem high but does not reflect reality.

Miyota 8215

The precision ranges given by the manufacturers are more aimed at establishing a classification of where the movement should be located, which is almost always more precise in practice.

Achieving good precision depends more on whether the movement has been properly adjusted by inserting it into the watch.

Because of this, there are users of this movement who report accuracies of less than + – 10 seconds / day, and others who only get – + 20 seconds per day.

In any case, it is a good movement, made up of millions of units and easily adjustable by a watchmaker.

➤ Power reserve

The 8215’s power reserve can be up to 42 hours when the mechanism is fully charged. This can be achieved with the movement of the wrist or by manual winding.

If we choose the second option, the mechanism can be fully loaded with 40 rotations of the crown clockwise.

➤ Brands that use it

Because it is a reliable and readily available movement, there are a large number of brands that use it in their mid-range and budget watches. These are some of them:

  • Festina
  • Vostok
  • Invicta
  • Jacques Lemans
  • AVI-8
  • Citizen
  • Gigandet
  • Pagani design
  • Stuhrling

And here are some examples of mechanical watches using the Miyota caliber mentioned above:

➤ The secret of fluctuating seconds

The 8215 is one of the mechanical movements in which the second hand is moved via the indirect drive system.

This means that with some watches it can be seen that the second hand does not slide as smoothly as a mechanical watch, but sometimes jumps slightly.

The point is that it is not a defect, but rather a peculiarity in the design of the movements that use this indirect system.

With these mechanisms, the second wheel is not part of the chassis, but engages independently in its own gear. If it’s not perfectly aligned, it can create this effect.

Fortunately, this does not affect the operation or precision of the watch in any way, although it may not suit the tastes of the most meticulous and attentive collectors.

✚ Miyota 8215 versus Seiko NH35A

Seiko NH35A caliber

The most notable difference from the Seiko NH35 is that the 8215 does not have a second stop, although it only does so when the watch is set.

Otherwise, both movements have similar specifications in terms of power reserve and precision and operate with the same vibrations per hour.

model Miyota 8215 Seiko NH35
Move Automatically Automatically
Jewellery 21st 24
Vibration frequency 21,600 vph 21,600 vph
Energy reserve 42 hours +41 hours
Dimensions 26 x 5.67 mm 27.40 x 5.32 mm
precision -20 ~ +40 s / day -20 ~ +40 s / day
Stop seconds No And
Remonte manual And And

✚ Miyota 8215 versus 9015

Caliber Miyota 9015

The Miyota 9015, on the other hand, is a movement from the same brand that is clearly superior in both precision and operation.

On the one hand it is much more precise than the 8215 at -10 ~ +30 sec / day and on the other hand it integrates stop seconds so that one could say that it is more functional.

In addition, the vibration frequency in the 9015 is much higher. This means that the second hand will jump faster and sweep more gently.

It’s also noteworthy that it’s much thinner, just 3.90mm compared to the 8215’s 5.67mm, which is important as it can affect the final thickness of the watch.

model 8215 9015
Move Automatically Automatically
Jewellery 21st 24
Vibration frequency 21,600 vph 28,800 vph
Energy reserve 42 hours 42 hours
Dimensions 26 x 5.67 mm 26 x 3.90 mm
precision -20 ~ +40 s / day -10 ~ +30 sec. / Day
Stop seconds No And
Remonte manual And And

✚ Miyota 8215 versus ETA 2824-2

Caliber ETA 2824-2

The ETA 2824-2 is a far superior Swiss movement in every way, both in terms of precision and performance, with a higher frequency of vibration and a smaller size.

While we’re talking about different leagues, the ETA 2824-2 is much more expensive and is usually mounted on high-end watches.

model 8215 ETA 2824-2
Move Automatically Automatically
Jewellery 21st 25th
Vibration frequency 21,600 vph 28,800 vph
Energy reserve 42 hours 38 hours
Dimensions 26 x 5.67 mm 25.6 x 4.6 mm
precision -20 ~ +40 s / day -4 ~ +30 sec. / Day
Stop seconds No And
Remonte manual And And

✚ Miyota 8215 versus Seiko 7S26

Seiko 7S36 caliber

The main difference from the Seiko 7S26 is that it does not have a manual lift, so you always have to carry it for it to work (or one rotating box).

Otherwise, the performance is practically the same in terms of precision, although the 7S26 is an older caliber and has already been discontinued in favor of the more modern Seiko 4R36.

model Miyota 8215 Seiko 7S26
Move Automatically Automatically
Jewellery 21st 21st
Vibration frequency 21,600 vph 21,600 vph
Energy reserve 42 hours 41 hours
Dimensions 26 x 5.67 mm 27.4 x 4.8 mm
precision -20 ~ +40 s / day -25 ~ +35 s / day
Stop seconds No No
Remonte manual And No

✚ Time and date setting

  • Hour: Pull the crown out (1 click) and turn it until the hands are in the desired position.
  • Date: Pull the crown out twice (2 clicks) and rotate it until the desired date is reached.
  • Remonte manual: Rotate the crown without removing it. It takes approximately 40 turns to fully load the mechanism. If it offers too much resistance, don’t force it.

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Last update of the links and pictures on 2021-02-04. Prices and availability may differ from the prices published on Amazon.

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