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Movement · Miyota (Citizen) · automatic

Miyota 9100 movement

Miyota 9100 is an automatic movement by Miyota (Citizen): 13½‴1 in size, 5.52 mm1 high, 261 jewels, beating at 28,800 bph1, 40 h1 of power reserve.

Sources checked · How we source numbers
Miyota 9100: movement drawingMiyota 9100, dial side, to scale: movement diameter — (unknown); size 13½‴; height 5.52 mm; hour, minute, second hand hole Ø — (unknown).movement Ø —13½‴ as printed5.52SIDE · SECTION · height 5.52Ahour, minute, second hand hole Ø —DETAIL A · 10:1
Miyota 9100, dial sideDrawing from data, not a photo · mm

Miyota 9100 at a glance

Diameter
13½‴1
Height
5.52 mm1
Jewels
261
Beat rate
28,800 bph1
Power reserve
40 h1
Accuracy
−10 to +30 s/day1
Lift angle
51°3

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

Setting and servicing the Miyota 9100

The figures a watchmaker or a timegrapher needs for the Miyota 9100, as Miyota prints them.

Lift angle
51°3
Accuracy (maker)
−10 to +30 s/day1
Positional difference
30 s/day1
Power reserve
40 h1
Hacking seconds
Yes1
Hand winding
Yes1
Crown turns to full wind
403

What fits the Miyota 9100

The figures a dial, hands or case must match for the Miyota 9100, as Miyota prints them.

Stem part number
065-A053

Same family at Miyota

How each differs from the Miyota 9100, worked out from the figures on its own page.

All Miyota 9100 figures

Every figure we hold for the Miyota 9100, with its source. Where sources disagree, each value is shown.

Size

Size in lignes
13½‴1
Height
5.52 mm1

Running

Jewels
261
Beat rate
28,800 bph1
Power reserve
40 h1
Hands and functions
hours, minutes, centre seconds, date1
Hacking seconds
Yes1
Hand winding
Yes1
Crown turns to full wind
403

Accuracy and care

Accuracy (maker)
−10 to +30 s/day1
Positional difference
30 s/day1
Lift angle
51°3

Fitting: dial, hands, stem

Stem part number
065-A053
Movement holder part
500-0023

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 9100 questions

What is the lift angle of the Miyota 9100?

51°, as Miyota prints it. Enter 51° on a timegrapher to read amplitude correctly for the Miyota 9100.

Source [3]

How accurate is the Miyota 9100?

Miyota rates the Miyota 9100 at −10 to +30 s/day, measured under Miyota’s own test conditions; a worn Miyota 9100 can run outside the −10 to +30 s/day range.

Source [1]

How long does the Miyota 9100 run when fully wound?

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

Source [1][2][3]

Does the Miyota 9100 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]

More on movements

Sources

Documents checked · Report a wrong number

  1. 1Citizen Watch Co., Ltd. (MIYOTA) — MIYOTA movement 9100 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 (9100) · pdf · read