Miyota Caliber 8205 Movement

Miyota Caliber 8205

Miyota Caliber 8205 Movement

Manufacturer Miyota (Citizen)
Caliber Number 8205
Base Caliber
Miyota 8215
Movement Type Automatic, self-winding mechanical
Linges 11.5”’
Diameter
26mm
Height 5.67mm (7.4 overall)
Min Case Diameter
30.3mm
Min Case Thickness
9.92mm
Jewels 21
Vibrations Per Hour
21,600 bph
Lift Angle
49 degrees
Shock System Parashock
Power Reserve
~42 hours
Rotor Winding Direction
Counterclockwise (uni-directional)
Hand-Windable? Yes
Hand Winding Direction
Clockwise (forward)
Balance Staff 039-1020 (Citizen)
Stem 065-212, tap 10 (Citizen)
Hand Sizes
1.52mm / 1.0mm / 0.17mm
Functions Central hours; central minutes; central seconds; day/date calendar at 3:00 or 6:00
Hacking Seconds? Yes and No
Country of Manufacture Japan
Known Brands
Timex Marlin, Timex Waterbury (Too many to list, add your watch in the comments below…)

The Miyota caliber 8205 is a 21 jewel automatic movement in the 8200 series of Miyota calibers. It is made in Japan and is found in many new microbrand watches because it is easily obtainable, low cost, and considered an entry level workhorse movement. This time-tested framework was introduced to the watch market around 1977.

Note: The 8205 is also available in gold tone: 8205 Gilt.

Caliber 8205 VS 8215:

There is a popular caliber 8215 which is virtually the same movement as the caliber 8205. The main difference between these movements is that the 8205 has a day/date complication and the 8215 is date only.

8205 VS 8203 / 8204:

Some of the following points need to be confirmed by physically inspecting the movements and testing what works with what, but basically:

  • The 8205 shares many of the same specs and features with the 8203 and 8204 – also sharing a majority of the same parts.
  • The 8205 is an updated version of the 8203. Hacking seconds may be one of the big changes.
  • The 8204 appears to be a Citizen-only movement (similar to how Seiko sells the NH35 to brands but uses the 4R35 in their own watches).

Therefore, it appears that all of the above Miyota/Citizen Day-Date movements should be interchangeable with each other including diameter, height and hand sizes – but it is untested. One thing that would be questionable is the stem part number, and unfortunately Miyota does not provide tech sheets for the cal. 8204 (another sign that it may be an internal movement).

With that said, if you swap movements, please talk about it in the comments below…

Accuracy & Power Reserve:

Miyota claims the caliber 8205 has an accuracy rating of -20 ~ +40 seconds per day. This is only measured within 10 to 60 minutes from a full power reserve. To achieve full power reserve, hand-wind the crown 40 times. Power reserve or fully wound running time is about 42 hours.

Time and Calendar Setting:

Setting the time and date on your 8205 powered timepiece is straightforward and not unlike most other watches:

  • You can hand wind the movement while the crown is in position 0.
  • Pull the crown out one click to position 1 to set the calendar. Turn the crown clockwise to advance the day of the week. Rotate the crown counterclockwise to advance the date.
  • Pull the crown out again (position 2) to set the time.
  • Do not set the date while the time is between 9:00pm and 4:00am.

Note: Although the 8205 has a quickset date, this does not mean the date instantly flips over at midnight. In fact, the changeover is not instantaneous, so do not be alarmed if you see a partial date when the hands are before or after 12:00AM.

Calendar Variations:

The Day wheel on the 8205 is bi-lingual and available in the following languages from Miyota:

  • English/Spanish
  • English/German
  • English/Portuguese
  • English/Chinese

It is interesting that there doesn’t seem to be an English/Kanji option.

Colors:

Unlike the 8215 which can be found with a white text on black background datewheel, the day/date wheels on the 8205 are only offered with a black text on white background.

The most common configuration for the 8205 is English/Spanish calendar located at 3:00. The next common is English/Chinese at 3:00. It is also possible to order this movement with the day/date at 6:00 in a vertical position, however, this and other languages are special orders and require a 1,000 minimum order quantity with a 2 month production time.

Hesitating Seconds:

The Miyota 8205 is one of the modern automatic movements that experiences a stuttering or hesitating second hand due to the indirect-drive system for running the central seconds. Learn all about Miyota “stuttering” seconds here.

Hacking Seconds:

There is some confusion about the Miyota 82XX series and whether these movements are hackable or not. The reason why this caliber is listed as “hacking: yes and no” is because Miyota only began equipping this family of movements with a stop seconds device around 2018 – 2019. If you are new to watch collection or pick up a brand new 8205 powered watch, it’s likely it will be hackable. However, this movement has been in production for quite some time (since the 1970s) and until recently, it was sold as a non-hacking movement. Therefore, there are still a lot of 8205 watches out there without hacking. In conclusion, if your 8205 watch hacks or doesn’t hack, it doesn’t mean it’s broken, it just means the movement in your watch was produced before or after hacking was introduced to the series.

Replacement Prices:

Replacement prices were found online in the $40-53.99 USD range for individual movements. When ordering wholesale, the caliber 8205 comes in packages of 100 (apparently this minimum used to be 300).

Are there fake Miyota 8205 movements?

Some China based movement factories are producing clones of the Miyota 8205 movement. Some are outright fakes marked with Miyota / Twenty-One 21 Jewels / Japan. Differences are often evident with the rotor (text, cutout, etc). These clones and fakes are being sold with the caliber number “8205”. Prices were found ranging from around $19.99 to $75.00 USD (more than an actual Miyota movement). Also beware of scam sellers using images of legitimate Miyota 8205 (they often steal pictures from this site and remove the watermark) but actually sending fakes.

Be sure to purchase from a reputable source and feel free to contact the seller beforehand for a guarantee that the movements they are selling are from Citizen/Miyota and are made in Japan.

Pros and Cons:

Pros:

  • Long history of being built on a dependable movement framework
  • Affordable to replace

Cons:

Additional Resources:

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Miyota Caliber 8203 Watch Movement | Caliber Corner
2 years ago

[…] The Miyota caliber 8203 is a 21 jewel automatic movement, first introduced in 1977 (other versions as early as 1974). This movement is from the Miyota 8200 family (aka 8 or 82 series) of movements. This 8203 has been discontinued by Miyota/Citizen and is no longer offered in their catalog of movements. It has evolved into the current Miyota caliber 8205. […]

trackback
What Movement is in the Timex Marlin? - Watch FAQs
2 years ago

[…] Timex Marlin automatic watch is powered by the Miyota caliber 8205 or the Miyota […]

1k2rp
1k2rp
2 years ago

Hi, add the Technos Automatic 8205oh/8p Bronze Watch Who uses those calibers. Technos Brasil has been a myiota customer for years.

Tudor
Tudor
2 years ago

The Festina Automatic F20478 series uses this caliber too.

trackback
Miyota (Citizen) Caliber 8204 Watch Movement | Caliber Corner
1 year ago

[…] The Miyota caliber 8204 is a 21 jewel automatic movement, first introduced in 1977 (other versions as early as 1974). This movement is from the Miyota 8200 family (aka 8 or 82 series) of movements. This 8204 has been discontinued by Miyota/Citizen and is no longer offered in their catalog of movements. It has evolved into the current Miyota caliber 8205. […]

trackback
Miyota Watch Movements (List) Watch Movement | Caliber Corner
1 year ago

[…] 8205 – 3-hander; day/date at 3:00 […]

tanierpolievky
tanierpolievky
1 year ago

Can somebody please clarify whether this is hackable or non-hackable? The page about miyota 8204 (hackable) says it evolved into 8205, which this page claims is non-hackable. However, Miyota’s own website says 8205 has “Stop second device”, which would mean it’s hackable.

Dominik Natter
Dominik Natter
1 year ago
Reply to  tanierpolievky

It is hackable, i own a watch with this movement.

Red
Red
4 months ago
Reply to  tanierpolievky

I believe that this movement was first released as undecorated without hacking. Later versions put a little more decoration on the movement, updated the rotor where it is now hallow, and do hack.

Vil
Vil
1 year ago

Thankyou for the info. on the 8205 as I’m looking at movements for my next build and this looks a goer.Does anyone have any alternate movement suggestions?

Tom
Tom
11 months ago

Is caliber 8205 an upgraded 8204? Thinking then whether it can replace 8203/8204 in a Citizen NY-0040 for example?

Attila
Attila
9 months ago

Iron Annie G38 Dessau 5366-1/-4/-5: Miyota 8205 Gilt

Ian Watson
Ian Watson
8 months ago

Didn’t HMT buy the whole 8205 production line as I am sure HMT put 8205’s into their watches?

Marcus
Marcus
8 months ago

I own an NY0040 09 with a dial that says 8203, but it is hacking, obviously an 8204 as the bottom also tells. A collector‘s edition?

Cathal Flood
Cathal Flood
8 months ago

The JUNKERS G38 has this movement, same watch as the Iron Annie mentioned here also.

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