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Movement · Miyota (Citizen) · automatic

Miyota 8205 movement

Miyota 8205 is an automatic movement by Miyota (Citizen): 11½‴1 in size, 5.67 mm1 high, 211 jewels, beating at 21,600 bph1, 42 h1 of power reserve.

Sources checked · How we source numbers
Miyota 8205: movement drawingMiyota 8205, dial side, to scale: movement diameter — (unknown); stem at 3H; date 3H window (size unknown); size 11½‴; height 5.67 mm; hour, minute, second hand hole Ø — (unknown).movement Ø —stem 3Hdate 3Hsize —, position only11½‴ as printed5.67SIDE · SECTION · height 5.67Ahour, minute, second hand hole Ø —DETAIL A · 10:1
Miyota 8205, dial sideDrawing from data, not a photo · mm

Miyota 8205 at a glance

Diameter
11½‴1
Height
5.67 mm1
Jewels
211
Beat rate
21,600 bph1
Power reserve
42 h1
Accuracy
−20 to +40 s/day1
Lift angle
49°3
Do not set the date
21:00–01:003

New to the terms? Read quartz vs automatic or watch movement types.

Setting and servicing the Miyota 8205

The figures a watchmaker or a timegrapher needs for the Miyota 8205, as Miyota prints them.

Lift angle
49°3
Accuracy (maker)
−20 to +40 s/day1
Positional difference
50 s/day1
Power reserve
42 h1
Do not set the date
21:00–01:003
Hacking seconds
Yes1
Hand winding
Yes1
Crown turns to full wind
403

What fits the Miyota 8205

The figures a dial, hands or case must match for the Miyota 8205, as Miyota prints them.

Date window
3H1
Crown
3H1
Stem part number
065-2123

Same family at Miyota

How each differs from the Miyota 8205, worked out from the figures on its own page.

What can replace the Miyota 8205

6 calibres of the Miyota 82xx group checked against the Miyota 8205: diameter, height, hand holes, date window, crown and dial feet. A verdict marked “not confirmed” lacks one of those figures for the Miyota 8205 or the other calibre.

Not published, so not checked in several comparisons:

  • a millimetre diameter for Miyota 8205
  • hand holes for Miyota 8205, Miyota 8215, Miyota 8315, Miyota 82S0, Miyota 82S5, Miyota 82S7 and Miyota 8N24
  • dial feet for Miyota 8205, Miyota 8315, Miyota 82S0, Miyota 82S5, Miyota 82S7 and Miyota 8N24
  • crown position for Miyota 8315, Miyota 82S0, Miyota 82S5, Miyota 82S7 and Miyota 8N24

  1. Miyota 8205 → Miyota 8215

    Fits with changes· not confirmed
    • =diameterSame size in lignes: 11½‴.
    • =heightSame height: 5.67 mm.
    • ≠dateMiyota 8215 has no day wheel: a day-date dial would show an empty day window.
    • =dateDate window at 3H on both.
    • =crownCrown at 3H on both.

  2. Miyota 8205 → Miyota 8315

    Fits with changes· not confirmed
    • =diameterSame size in lignes: 11½‴.
    • =heightSame height: 5.67 mm.
    • ≠dateMiyota 8315 has no day wheel: a day-date dial would show an empty day window.

    Not published, so not checked: date position for Miyota 8315.

  3. Miyota 8205 → Miyota 82S0

    Fits with changes· not confirmed
    • =diameterSame size in lignes: 11½‴.
    • =heightSame height: 5.67 mm.
    • ≠dateMiyota 82S0 has no day wheel: a day-date dial would show an empty day window.
    • ≠dateMiyota 82S0 has no date: a dial with a date window would show nothing in it.

  4. Miyota 8205 → Miyota 82S5

    Fits with changes· not confirmed
    • =diameterSame size in lignes: 11½‴.
    • =heightSame height: 5.67 mm.
    • ≠functionsMiyota 82S5 adds a small seconds: it needs a dial and hand set made for it.
    • ≠dateMiyota 82S5 has no day wheel: a day-date dial would show an empty day window.
    • ≠dateMiyota 82S5 has no date: a dial with a date window would show nothing in it.

  5. Miyota 8205 → Miyota 82S7

    Fits with changes· not confirmed
    • =diameterSame size in lignes: 11½‴.
    • =heightSame height: 5.67 mm.
    • ≠functionsMiyota 82S7 adds a small seconds: it needs a dial and hand set made for it.
    • ≠dateMiyota 82S7 has no day wheel: a day-date dial would show an empty day window.
    • ≠dateMiyota 82S7 has no date: a dial with a date window would show nothing in it.

  6. Miyota 8205 → Miyota 8N24

    Fits with changes· not confirmed
    • =diameterSame size in lignes: 11½‴.
    • ≠heightMiyota 8N24 is 0.12 mm thinner (5.55 mm vs 5.67 mm): the dial and hands sit lower, so a spacer or a different stem height may be needed.
    • ≠dateMiyota 8N24 has no day wheel: a day-date dial would show an empty day window.
    • ≠dateMiyota 8N24 has no date: a dial with a date window would show nothing in it.

All Miyota 8205 figures

Every figure we hold for the Miyota 8205, with its source. Where sources disagree, each value is shown.

Size

Size in lignes
11½‴1
Height
5.67 mm1

Running

Jewels
211
Beat rate
21,600 bph1
Power reserve
42 h1
Hands and functions
hours, minutes, centre seconds, day, date1
Hacking seconds
Yes1
Hand winding
Yes1
Crown turns to full wind
403

Accuracy and care

Accuracy (maker)
−20 to +40 s/day1
Positional difference
50 s/day1
Lift angle
49°3
Do not set the date
21:00–01:003

Fitting: dial, hands, stem

Date window
3H1
Crown
3H1
Stem part number
065-2123
Movement holder part
500-7103
Dial screw part
929-6103

Not published yet

  • Hand holes: only in Miyota’s drawing; not read yet
  • Dial feet: not in the documents we read

Versions

8205-3CE · 8205-3SE*[1]

Miyota 8205 questions

What is the lift angle of the Miyota 8205?

49°, as Miyota prints it. Enter 49° on a timegrapher to read amplitude correctly for the Miyota 8205.

Source [3]

How accurate is the Miyota 8205?

Miyota rates the Miyota 8205 at −20 to +40 s/day, measured under Miyota’s own test conditions; a worn Miyota 8205 can run outside the −20 to +40 s/day range.

Source [1]

How long does the Miyota 8205 run when fully wound?

About 42 h from a full wind, per Miyota; a full hand wind takes about 40 crown turns.

Source [1][2][3]

When should you not change the date on the Miyota 8205?

Not between 21:00 and 01:00, per Miyota: the Miyota 8205’s date change is engaged then, so move its hands past 01:00 before using the quick-set.

Source [3][4]

Does the Miyota 8205 hack and hand-wind?

Yes, it hacks: the seconds hand stops with the crown pulled out. It can be wound by the crown.

Source [1]

What can replace the Miyota 8205?

From the published figures, the closest is the Miyota 8215: fits with changes, not confirmed for every part, with 5 more in the same group. Miyota 8215 has no day wheel: a day-date dial would show an empty day window.

More on movements

Sources

Documents checked · Report a wrong number

  1. 1Citizen Watch Co., Ltd. (MIYOTA) — MIYOTA movement 8205 product page · html · read
  2. 2Citizen Watch Co., Ltd. (MIYOTA) — MIYOTA movement overview (catalogue table, 2 pages) · pdf · read
  3. 3Citizen Watch Co., Ltd. (MIYOTA) — Spec. sheet (8205) · pdf · read
  4. 4Citizen Watch Co., Ltd. (MIYOTA) — Instruction manual (8205) · pdf · read