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Movement · Miyota (Citizen) · automatic

Miyota 8215 movement

Miyota 8215 is an automatic movement by Miyota (Citizen): 25.6 mm1 across, 5.67 mm2 high, 212 jewels, beating at 21,600 bph2, 42 h2 of power reserve.

Sources checked · How we source numbers
Miyota 8215: movement drawingMiyota 8215, dial side, to scale: movement diameter — (unknown); casing diameter 25.6 mm; stem at 3H; date 3H window 2.35 × 1.9 mm, centre 10.125 mm from the axis; date 6H window (size unknown); dial foot F1 at x 2.17 mm, y −11.86 mm (about 5:39); dial foot F2 at x −7.07 mm, y 9.8 mm (about 10:48); size 11½‴; height 5.67 mm; hour, minute, second hand hole Ø — (unknown); dial centre hole Ø 2 mm.movement Ø —casing Ø 25.610.125stem 3Hdate 3H 2.35 × 1.9centre 10.125 from axisdate 6Hsize —, position onlyF1 5:39x 2.17 y −11.86F2 10:48x −7.07 y 9.811½‴ as printed5.67SIDE · SECTION · height 5.67Adial hole Ø 2hour, minute, second hand hole Ø —DETAIL A · 6:1
Miyota 8215, dial sideDrawing from data, not a photo · mm

Miyota 8215 at a glance

Diameter
25.6 mm1
Height
5.67 mm2
Jewels
212
Beat rate
21,600 bph2
Power reserve
42 h2
Accuracy
−20 to +40 s/day2
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 8215

The figures a watchmaker or a timegrapher needs for the Miyota 8215, as Miyota prints them.

Lift angle
49°3
Accuracy (maker)
−20 to +40 s/day2
Positional difference
50 s/day2
Power reserve
42 h2
Do not set the date
21:00–01:003
Hacking seconds
Yes2
Hand winding
Yes2
Crown turns to full wind
403

What fits the Miyota 8215

The figures a dial, hands or case must match for the Miyota 8215, as Miyota prints them.

Dial feet
5:39, 10:481 · 5:39, 10:481
Dial centre hole
2 mm1
Casing diameter
25.6 mm1
Date window
3H, 6H2 · 3H1
Crown
3H2
Stem length
total 20 mm1
Stem part number
065-2123
  • The Dixmont DG2813 is based on the Miyota 8215[6](secondary source).

What can replace the Miyota 8215

7 calibres of the Miyota 82xx group checked against the Miyota 8215: diameter, height, hand holes, date window, crown and dial feet. A verdict marked “not confirmed” lacks one of those figures for the Miyota 8215 or the other calibre.

Not published, so not checked in several comparisons:

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

  1. Miyota 8215 → Miyota 8315

    Drop-in· not confirmed
    • =diameterSame size in lignes: 11½‴.
    • =heightSame height: 5.67 mm.

  2. Miyota 8215 → Miyota 8205

    Fits with changes· not confirmed
    • =diameterSame size in lignes: 11½‴.
    • =heightSame height: 5.67 mm.
    • ≠dateMiyota 8205 adds a day wheel: a date-only dial hides it, and the crown gets a day-setting step.
    • =dateDate window at 3H on both.
    • =crownCrown at 3H on both.

  3. Miyota 8215 → Miyota 821A

    Fits with changes· not confirmed
    • ?diameterDiameter not published for both: the case seat cannot be checked.
    • =heightSame height: 5.67 mm.
    • ≠dateMiyota 821A adds a day wheel: a date-only dial hides it, and the crown gets a day-setting step.

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

  4. Miyota 8215 → Miyota 82S0

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

  5. Miyota 8215 → 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 date: a dial with a date window would show nothing in it.

  6. Miyota 8215 → 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 date: a dial with a date window would show nothing in it.

  7. Miyota 8215 → 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 date: a dial with a date window would show nothing in it.

All Miyota 8215 figures

Every figure we hold for the Miyota 8215, with its source. Where sources disagree, each value is shown.

Size

Size in lignes
11½‴2
Casing diameter
25.6 mm1
Height
5.67 mm2

Running

Jewels
212
Beat rate
21,600 bph2
Power reserve
42 h2
Hands and functions
hours, minutes, centre seconds, date2
Hacking seconds
Yes2
Hand winding
Yes2
Crown turns to full wind
403

Accuracy and care

Accuracy (maker)
−20 to +40 s/day2
Positional difference
50 s/day2
Lift angle
49°3
Do not set the date
21:00–01:003

Fitting: dial, hands, stem

Date window
3H, 6H2 · 3H1
Crown
3H2
Dial feet
5:39, 10:481 · 5:39, 10:481
Dial centre hole
2 mm1
Stem part number
065-2123
Stem length
total 20 mm1
Movement holder part
500-7103
Dial screw part
929-6103

Not published yet

  • Hand holes: only in Miyota’s drawing; not read yet

Versions

8215-33E · 8215-36E*[2]

Miyota 8215 questions

What is the lift angle of the Miyota 8215?

49°, as Miyota prints it. Enter 49° on a timegrapher to read amplitude correctly for the Miyota 8215.

Source [3]

How accurate is the Miyota 8215?

Miyota rates the Miyota 8215 at −20 to +40 s/day, measured under Miyota’s own test conditions; a worn Miyota 8215 can run outside the −20 to +40 s/day range.

Source [2][3]

How long does the Miyota 8215 run when fully wound?

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

Source [2][3][4]

When should you not change the date on the Miyota 8215?

Not between 21:00 and 01:00, per Miyota: the Miyota 8215’s date change is engaged then, so move its hands past 01:00 before using the quick-set.

Source [3][5]

Does the Miyota 8215 hack and hand-wind?

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

Source [2]

What can replace the Miyota 8215?

From the published figures, the closest is the Miyota 8315: drop-in, not confirmed for every part. Same size in lignes: 11½‴.

More on movements

Sources

Documents checked · Report a wrong number

  1. 1Citizen Watch / Miyota — CAL.8215 Drawing (p.1 Frame for Case 8215001, p.2 Indications for Dial 8215-33E, p.3 Setting Stem 065-212, p.4 Casing Holder 500-710) · pdf · read
  2. 2Citizen Watch Co., Ltd. (MIYOTA) — MIYOTA movement 8215 product page · html · read
  3. 3Citizen Watch Co., Ltd. (MIYOTA) — CAL.8215 Spec. sheet · pdf · read
  4. 4Citizen Watch Co., Ltd. (MIYOTA) — MIYOTA movement overview (catalogue table, 2 pages) · pdf · read
  5. 5Citizen Watch Co., Ltd. (MIYOTA) — CAL.8215 Instruction manual · pdf · read
  6. 6CaliberCorner — PTS Caliber DG 2813 (CaliberCorner) · html · read