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Seiko watch · Prospex · automatic

Seiko SLA017

The Seiko SLA017 measures 40 mm across and 14 mm thick, with 19 mm lugs.

Sources checked · How we source numbers
Case
40 mm1
2 sources disagree; show every value
  • seller listing 40 mm1
  • secondary source 39.9 mm2
Lug to lug
not published by Seiko
Thickness
14 mm1
Lug width
19 mm1
Seiko SLA017: size drawingSeiko SLA017, round case, top and side view to scale: case diameter 40 mm, lug to lug — (unknown), lug width 19 mm, thickness 14 mm, rotating bezel. Bezel, dial and crown size are schematic.lug width 19Ø 40lug to lug —TOPthickness 14SIDE
Seiko SLA017, top and side, to scaleDrawing from data, not a photo · mm

Seiko SLA017 specifications

Case diameter
40 mm1seller listing
2 sources disagree; show every value
  • seller listing 40 mm1
  • secondary source 39.9 mm2
Lug to lug
not published by Seiko
Thickness
14 mm1seller listing
Lug width
19 mm1seller listing19 mm watches
Crystal
Sapphire1seller listing
Water resistance
200 m1seller listing
Movement
Seiko 8L351seller listing · automaticSeiko 8L35 specs
Battery
none: the Seiko 8L35 is automatic
Years made
20172secondary source – 20172secondary source
Case code
not in our data yet
Bezel
rotating2secondary source
Case shape
round2secondary source
Line
Prospex2secondary source

On your wrist

No lug-to-lug or case length is published for the Seiko SLA017, so there is no fit verdict yet.

Actual size on your screen

Calibrate once with a bank card and the drawing shows the Seiko SLA017 at 1:1, next to a millimetre ruler.

1:1 · not calibrated: sizes are approximate
Seiko SLA017: size drawingSeiko SLA017, round case, top and side view to scale: case diameter 40 mm, lug to lug — (unknown), lug width 19 mm, thickness 14 mm, rotating bezel. Bezel, dial and crown size are schematic.lug width 19Ø 40lug to lug —TOPthickness 14SIDE
Drawing from data, not a photo · mm
01020304050

Seiko SLA017 strap size

Lug width 19 mm1seller listing: a 19 mm strap with 19 mm spring bars fits between the lugs. 5 other models take 19 mm.

Attachment: not published in our sources.

Find your strap length in the watch strap size tool, with the Seiko SLA017 filled in.

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

19 mm strap: strap diagramTwo-piece strap laid flat (19 mm strap). Lug width 19 mm. Short piece — (unknown), long piece — (unknown). Buckle, keepers and holes are schematic.short —long —lug 19lug 19strap length —19 mm strap
19 mm at the lugs; lengths depend on your wristDrawing from data, not a photo · mm

Movement: Seiko 8L35

The Seiko SLA017 runs on the Seiko 8L35, an automatic movement. 2 other models in our base use it.

Beat rate
28,800 bph3
Power reserve
50 h3
Jewels
263
Accuracy
−10 to +15 s/day3
Hacking seconds
Yes3
Hand winding
Yes3

Battery

none: the Seiko 8L35 is automatic

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

Same size as the Seiko SLA017

Same movement: Seiko 8L35

Seiko SLA017 questions

Does the Seiko SLA017 need a battery?

No. The Seiko SLA017 has no cell to replace: a wound mainspring drives its automatic Seiko 8L35.

What movement is in the Seiko SLA017?

The Seiko SLA017 runs on the Seiko 8L35, an automatic movement.

What strap size does the Seiko SLA017 take?

The Seiko SLA017 measures 19 mm between the lugs, so it takes a 19 mm strap with 19 mm spring bars. 5 other models in our base share that width.

Find the strap length for your wrist and the Seiko SLA017 in the watch strap size tool.

More Seiko watches

Sources

Documents checked · Report a wrong number

  1. 1Right Time International — SLA017 listing, Right Time (Denver), dealer spec block · html · read
  2. 2WatchBase — SLA017J1 Prospex Diver, WatchBase database entry · html · read
  3. 3Seiko Watch Corporation — Mechanical watch instructions, Cal. 8L35 (EN) · pdf · read
  4. 4CaliberCorner — Seiko Caliber 8L35 watch movement page · html · read
  5. 5Grail Watch — Grail Watch Reference: Seiko 8L35 · html · read