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Seiko watch · automatic

Seiko SKX013

The Seiko SKX013 measures 38 mm across and 13 mm thick, with 20 mm lugs.

Sources checked · How we source numbers
Case
38 mm1
2 sources disagree; show every value
  • seller listing 38 mm1
  • secondary source 37 mm2
Lug to lug
source not reachable yet
Thickness
13 mm1
Lug width
20 mm2
SKX013, front view, on NATO strap
Photo: Olgierd (Creative Commons licensed only), CC BY 2.0, via Wikimedia Commons
Seiko SKX013: size drawingSeiko SKX013, round case, top and side view to scale: case diameter 38 mm, lug to lug — (unknown), lug width 20 mm, thickness 13 mm. Bezel, dial and crown size are schematic.lug width 20Ø 38lug to lug —TOPthickness 13SIDE
Seiko SKX013, top and side, to scaleDrawing from data, not a photo · mm

Seiko SKX013 specifications

Case diameter
38 mm1seller listing
2 sources disagree; show every value
  • seller listing 38 mm1
  • secondary source 37 mm2
Lug to lug
source not reachable yet
Thickness
13 mm1seller listing
Lug width
20 mm2secondary source20 mm watches
Crystal
Hardlex1seller listing
Water resistance
200 m1seller listing
Movement
Seiko 7S261seller listing · automaticSeiko 7S26 specs
Battery
none: the Seiko 7S26 is automatic
Years made
start not published
Case code
not in our data yet

Movement: Seiko 7S26

The Seiko SKX013 runs on the Seiko 7S26, an automatic movement. 2 other models in our base use it.

Beat rate
21,600 bph3
Power reserve
41 h3
Jewels
213

Battery

none: the Seiko 7S26 is automatic

A mechanical watch has no cell to replace; it needs a service instead.

Same size as the Seiko SKX013

Same movement: Seiko 7S26

On your wrist

No lug-to-lug or case length is published for the Seiko SKX013, so there is no fit verdict yet.

Actual size on your screen

Calibrate once with a bank card and the drawing shows the Seiko SKX013 at 1:1, next to a millimetre ruler.

1:1 · not calibrated: sizes are approximate
Seiko SKX013: size drawingSeiko SKX013, round case, top and side view to scale: case diameter 38 mm, lug to lug — (unknown), lug width 20 mm, thickness 13 mm. Bezel, dial and crown size are schematic.lug width 20Ø 38lug to lug —TOPthickness 13SIDE
Drawing from data, not a photo · mm
01020304050

Seiko SKX013 strap size

Lug width 20 mm2secondary source: a 20 mm strap with 20 mm spring bars fits between the lugs. 63 other models take 20 mm.

Attachment: not published in our sources.

Find your strap length in the watch strap size tool, with the Seiko SKX013 filled in.

On a bracelet? How to remove watch links to size it to your wrist.

20 mm strap: strap diagramTwo-piece strap laid flat (20 mm strap). Lug width 20 mm. Short piece — (unknown), long piece — (unknown). Buckle, keepers and holes are schematic.short —long —lug 20lug 20strap length —20 mm strap
20 mm at the lugs; lengths depend on your wristDrawing from data, not a photo · mm

Parts documented for the Seiko SKX013

5 claims for named aftermarket parts are in the catalogue. Each claim is tied to this exact model and its seller’s source.

Seiko SKX013 questions

What movement is in the Seiko SKX013?

The Seiko SKX013 runs on the Seiko 7S26, an automatic movement.

Does the Seiko SKX013 need a battery?

No. The Seiko SKX013 has no cell to replace: a wound mainspring drives its automatic Seiko 7S26.

What strap size does the Seiko SKX013 take?

The Seiko SKX013 measures 20 mm between the lugs, so it takes a 20 mm strap with 20 mm spring bars. 63 other models in our base share that width.

Find the strap length for your wrist and the Seiko SKX013 in the watch strap size tool.

More Seiko watches

Sources

Documents checked · Report a wrong number

  1. 1Watchoutz — Seiko 5 Sports Automatic 200M Diver Black-Dial SKX013K1 (product page) · html · read
  2. 2StrapsCo — Seiko SKX013 Lug Width & Strap Size · html · read
  3. 3Seiko Watch Corporation — Instructions: Seiko Automatic Diver's Watch Cal. 4R15/4R16/4R35/4R36/7S26/7S35/7S36 (English) · pdf · read
  4. 4Grail Watch — Grail Watch Reference: Seiko Cal. 7S26 · html · read