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Movement · Miyota (Citizen) · automatic

Miyota 8N24 movement

Miyota 8N24 is an automatic movement by Miyota (Citizen): 11½‴1 in size, 5.55 mm1 high, 211 jewels, beating at 21,600 bph1, 42 h1 of power reserve.

Sources checked · How we source numbers
Miyota 8N24: movement drawingMiyota 8N24, dial side, to scale: movement diameter — (unknown); size 11½‴; height 5.55 mm; hour, minute, second hand hole Ø — (unknown).movement Ø —11½‴ as printed5.55SIDE · SECTION · height 5.55Ahour, minute, second hand hole Ø —DETAIL A · 10:1
Miyota 8N24, dial sideDrawing from data, not a photo · mm

Miyota 8N24 at a glance

Diameter
11½‴1
Height
5.55 mm1
Jewels
211
Beat rate
21,600 bph1
Power reserve
42 h1
Accuracy
−20 to +40 s/day1
Lift angle
49°3

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

Setting and servicing the Miyota 8N24

The figures a watchmaker or a timegrapher needs for the Miyota 8N24, as Miyota prints them.

Lift angle
49°3
Accuracy (maker)
−20 to +40 s/day1
Positional difference
50 s/day1
Power reserve
42 h1
Hacking seconds
Yes1
Hand winding
Yes1
Crown turns to full wind
403

What fits the Miyota 8N24

The figures a dial, hands or case must match for the Miyota 8N24, as Miyota prints them.

Stem part number
065-2123

Same family at Miyota

How each differs from the Miyota 8N24, worked out from the figures on its own page.

What can replace the Miyota 8N24

7 calibres of the Miyota 82xx group checked against the Miyota 8N24: diameter, height, hand holes, date window, crown and dial feet. A verdict marked “not confirmed” lacks one of those figures for the Miyota 8N24 or the other calibre.

Not published, so not checked in several comparisons:

  • a millimetre diameter for Miyota 8N24
  • hand holes for Miyota 8N24, Miyota 82S0, Miyota 8215, Miyota 82S5, Miyota 82S7, Miyota 8315, Miyota 8205 and Miyota 821A
  • crown position for Miyota 8N24, Miyota 82S0, Miyota 82S5, Miyota 82S7, Miyota 8315 and Miyota 821A
  • dial feet for Miyota 8N24, Miyota 82S0, Miyota 82S5, Miyota 82S7, Miyota 8315, Miyota 8205 and Miyota 821A

  1. Miyota 8N24 → Miyota 82S0

    Fits with changes· not confirmed
    • =diameterSame size in lignes: 11½‴.
    • ≠heightMiyota 82S0 is 0.12 mm taller (5.67 mm vs 5.55 mm): check the room under the crystal and the case back; the hands sit higher.

  2. Miyota 8N24 → Miyota 8215

    Fits with changes· not confirmed
    • =diameterSame size in lignes: 11½‴.
    • ≠heightMiyota 8215 is 0.12 mm taller (5.67 mm vs 5.55 mm): check the room under the crystal and the case back; the hands sit higher.
    • ≠dateMiyota 8215 has a date: a dial without a window hides it, and the crown gets a date-setting step.

  3. Miyota 8N24 → Miyota 82S5

    Fits with changes· not confirmed
    • =diameterSame size in lignes: 11½‴.
    • ≠heightMiyota 82S5 is 0.12 mm taller (5.67 mm vs 5.55 mm): check the room under the crystal and the case back; the hands sit higher.
    • ≠functionsMiyota 82S5 adds a small seconds: it needs a dial and hand set made for it.

  4. Miyota 8N24 → Miyota 82S7

    Fits with changes· not confirmed
    • =diameterSame size in lignes: 11½‴.
    • ≠heightMiyota 82S7 is 0.12 mm taller (5.67 mm vs 5.55 mm): check the room under the crystal and the case back; the hands sit higher.
    • ≠functionsMiyota 82S7 adds a small seconds: it needs a dial and hand set made for it.

  5. Miyota 8N24 → Miyota 8315

    Fits with changes· not confirmed
    • =diameterSame size in lignes: 11½‴.
    • ≠heightMiyota 8315 is 0.12 mm taller (5.67 mm vs 5.55 mm): check the room under the crystal and the case back; the hands sit higher.
    • ≠dateMiyota 8315 has a date: a dial without a window hides it, and the crown gets a date-setting step.

  6. Miyota 8N24 → Miyota 8205

    Fits with changes· not confirmed
    • =diameterSame size in lignes: 11½‴.
    • ≠heightMiyota 8205 is 0.12 mm taller (5.67 mm vs 5.55 mm): check the room under the crystal and the case back; the hands sit higher.
    • ≠dateMiyota 8205 adds a day wheel: a date-only dial hides it, and the crown gets a day-setting step.
    • ≠dateMiyota 8205 has a date: a dial without a window hides it, and the crown gets a date-setting step.

  7. Miyota 8N24 → Miyota 821A

    Fits with changes· not confirmed
    • ?diameterDiameter not published for both: the case seat cannot be checked.
    • ≠heightMiyota 821A is 0.12 mm taller (5.67 mm vs 5.55 mm): check the room under the crystal and the case back; the hands sit higher.
    • ≠dateMiyota 821A adds a day wheel: a date-only dial hides it, and the crown gets a day-setting step.
    • ≠dateMiyota 821A has a date: a dial without a window hides it, and the crown gets a date-setting step.

    Not published, so not checked: diameter for Miyota 821A.

All Miyota 8N24 figures

Every figure we hold for the Miyota 8N24, with its source. Where sources disagree, each value is shown.

Size

Size in lignes
11½‴1
Height
5.55 mm1

Running

Jewels
211
Beat rate
21,600 bph1
Power reserve
42 h1
Hands and functions
hours, minutes, centre seconds1
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

Fitting: dial, hands, stem

Stem part number
065-2123
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
  • Do not set the date: not in the documents we read

Miyota 8N24 questions

What is the lift angle of the Miyota 8N24?

49°, as Miyota prints it. Enter 49° on a timegrapher to read amplitude correctly for the Miyota 8N24.

Source [3]

How accurate is the Miyota 8N24?

Miyota rates the Miyota 8N24 at −20 to +40 s/day, measured under Miyota’s own test conditions; a worn Miyota 8N24 can run outside the −20 to +40 s/day range.

Source [1]

How long does the Miyota 8N24 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]

Does the Miyota 8N24 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 8N24?

From the published figures, the closest is the Miyota 82S0: fits with changes, not confirmed for every part, with 6 more in the same group. Miyota 82S0 is 0.12 mm taller (5.67 mm vs 5.55 mm): check the room under the crystal and the case back; the hands sit higher.

More on movements

Sources

Documents checked · Report a wrong number

  1. 1Citizen Watch Co., Ltd. (MIYOTA) — MIYOTA movement 8N24 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 (8N24) · pdf · read