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Movement · TMI (Seiko Instruments) · mecha-quartz

Seiko VK63 (TMI) movement

Seiko VK63 (TMI) takes SR936SW3, lasting about 3 years3. It is a mecha-quartz movement by TMI (Seiko Instruments): 30.8 mm1 across, 5.1 mm2 high, accurate to ±20 s/month3. 1 watch in our base uses it: 1962 Racing Chronograph Black (list).

Sources checked · How we source numbers
TMI VK63: movement drawingTMI VK63, dial side, to scale: movement diameter 30.8 mm; casing diameter 29 mm; size 13½‴; height 5.1 mm; hour, minute, second hand hole Ø — (unknown).movement Ø 30.8casing Ø 2913½‴ as printed · Ø 30.8 = 13.65‴5.1SIDE · SECTION · height 5.1Ahour, minute, second hand hole Ø —DETAIL A · 10:1
TMI VK63, dial sideDrawing from data, not a photo · mm

VK63 at a glance

Diameter
30.8 mm1
Height
5.1 mm2
Battery
SR936SW3
Battery life
3 years3
Accuracy
±20 s/month3
Jewels
03
Hands and functions
chronograph, 24-hour hand, small seconds, date2
Do not set the date
21:00–03:004

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

Watches with the VK63

What fits the VK63

The figures a dial, hands or case must match for the VK63, as TMI prints them.

Casing diameter
29 mm3

Battery for the VK63

  • SR936SW[3]Sizes and equivalents of the SR936SW on its page

Running the VK63

Accuracy and battery figures for the VK63, as TMI prints them.

Accuracy (maker)
±20 s/month3Measured by quartz tester, 60 min chrono operation per day
Battery life
3 years3
Do not set the date
21:00–03:004

Same family at TMI

How each differs from the VK63, worked out from the figures on its own page.

All VK63 figures

Every figure we hold for the VK63, with its source. Where sources disagree, each value is shown.

Size

Size in lignes
13½‴2
Diameter
30.8 mm1
Casing diameter
29 mm3
Height
5.1 mm2

Running

Jewels
03
Hands and functions
chronograph, 24-hour hand, small seconds, date2

Accuracy and care

Accuracy (maker)
±20 s/month3
Do not set the date
21:00–03:004

Power

Battery
SR936SW3
Battery life
3 years3

Origin

Made in
Japan2

Not published yet

  • Low-battery sign: not published
  • Hand height options: only in TMI’s drawing; not read yet
  • Hand holes: only in TMI’s drawing; not read yet
  • Dial feet: only in TMI’s drawing; not read yet
  • Stem part number: not in the documents we read

Versions

VK63A32 · VK63A34 · VK63A34B · VK63A44 · VK63A44B[6]

VK63 questions

Which watches use the VK63?

1 watch in our base name the VK63: 1962 Racing Chronograph Black.

What battery does the TMI VK63 take?

The TMI VK63 takes SR936SW; TMI gives 3 years of life.

Source [3]

When should you not change the date on the VK63?

Not between 21:00 and 03:00, per TMI: the VK63’s date change is engaged then, so move its hands past 03:00 before using the quick-set.

Source [4]

More on movements

Sources

Documents checked · Report a wrong number

  1. 1Time Module Ltd. — TMI Watch Movement Specification and Drawing (Spec Sheet) VK63 · pdf · read
  2. 2Time Module Ltd. — Product Line-Up - Premium Chronograph (VK): VK61-VK73 blocks · html · read
  3. 3Time Module Ltd. — TMI Technical Guide & Parts Catalogue VK63 · pdf · read
  4. 4Time Module Ltd. — TMI Operation Manual VK63 · pdf · read
  5. 5Dan Henry Watches — 1962 Racing Chronograph | Black · html · read