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Seiko watch · Presage

Seiko SSA425

The Seiko SSA425 measures 40.8 mm across, 47 mm lug to lug, and 12.8 mm thick, with 20 mm lugs. It fits wrists from ~16.5 cm (flat-fit estimate).

Sources checked · How we source numbers
Case
40.8 mm1
Lug to lug
47 mm1
Thickness
12.8 mm1
Lug width
20 mm1
Seiko SSA425: size drawingSeiko SSA425, round case, top and side view to scale: case diameter 40.8 mm, lug to lug 47 mm, lug width 20 mm, thickness 12.8 mm. Bezel, dial and crown size are schematic.lug width 20Ø 40.8lug to lug 47TOPthickness 12.8SIDE
Seiko SSA425, top and side, to scaleDrawing from data, not a photo · mm

Seiko SSA425 specifications

Case diameter
40.8 mm1
Lug to lug
47 mm1
Thickness
12.8 mm1
Lug width
20 mm120 mm watches
Weight
140 g1
Crystal
Box-shaped Hardlex1
Water resistance
5 bar (50 m)1
Movement
not found in our sources yet
Battery
not published
Years made
start not published
Case code
not in our data yet
Line
Presage1

On your wrist

The verdict compares the lug to lug with the flat top of your wrist. Balanced from ~16.5 cm, past the edges below ~15 cm.

= 6.7 in

Balanced on a 17 cm wrist: the 47 mm lug to lug covers 86% of an estimated 54.8 mm flat top.

Flat top = circumference ÷ 3.1, a community convention, not a measurement of your arm. Compact ≤ 0.75 of the flat top, balanced ≤ 0.89, at the edge ≤ 1. Compare more watches in the watch size calculator.

Seiko SSA425: wrist fitSeiko SSA425 on a wrist, top view to scale. lug to lug 47 mm. Wrist 170 mm, estimated flat width 54.8 mm (circumference / 3.1). Ratio 0.86: balanced.wrist, flat topwrist flat ≈ 54.8lug to lug 47Balanced · 47 / 54.8 = 0.86estimate: wrist 170 / 3.1 = 54.8 flatcompactbalancededgeoverhang0.750.891
Seiko SSA425 on a 17 cm wristDrawing from data, not a photo · mm

Actual size on your screen

Calibrate once with a bank card and the drawing shows the Seiko SSA425 at 1:1, next to a millimetre ruler.

1:1 · not calibrated: sizes are approximate
Seiko SSA425: size drawingSeiko SSA425, round case, top and side view to scale: case diameter 40.8 mm, lug to lug 47 mm, lug width 20 mm, thickness 12.8 mm. Bezel, dial and crown size are schematic.lug width 20Ø 40.8lug to lug 47TOPthickness 12.8SIDE
Drawing from data, not a photo · mm
01020304050

Seiko SSA425 strap size

Lug width 20 mm1: a 20 mm strap with 20 mm spring bars fits between the lugs. 62 other models take 20 mm.

Attachment: not published in our sources.

Find your strap length in the watch strap size tool, with the Seiko SSA425 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

Movement

Our sources don't name the movement of the Seiko SSA425 yet.

Same size as the Seiko SSA425

The models nearest to the Seiko SSA425 in case width and lug to lug, drawn over it to scale; below, every model within 1 mm of its 47 mm.

Size comparison: Seiko SSA425, Zelos Thresher 41mm Dusk, Seiko SRPG05, Seiko SRPD37Top-view outlines to scale on one centre. A Seiko SSA425: Ø 40.8, L2L 47, lug 20, T 12.8. B Zelos Thresher 41mm Dusk: Ø 41, L2L 47, lug 20, T 12.7 (vs A: Ø +0.2 L2L 0 lug 0 T −0.1). C Seiko SRPG05: Ø 41, L2L 47, lug —, T 12 (vs A: Ø +0.2 L2L 0 T −0.8). D Seiko SRPD37: Ø 40.5, L2L 47.5, lug 20, T 11.8 (vs A: Ø −0.3 L2L +0.5 lug 0 T −1).D Ø 40.5A Ø 40.8B Ø 41C Ø 41A L2L 47B L2L 47C L2L 47D L2L 47.5A Seiko SSA425Ø 40.8 · L2L 47 · lug 20 · T 12.8B Zelos Thresher 41mm DuskØ 41 · L2L 47 · lug 20 · T 12.7vs A: Ø +0.2 L2L 0 lug 0 T −0.1C Seiko SRPG05Ø 41 · L2L 47 · lug — · T 12vs A: Ø +0.2 L2L 0 T −0.8D Seiko SRPD37Ø 40.5 · L2L 47.5 · lug 20 · T 11.8vs A: Ø −0.3 L2L +0.5 lug 0 T −1
A Seiko SSA425 and the 3 nearest in size, on one centre, to scaleDrawing from data, not a photo · mm

Nearest in size

  1. ASeiko SSA425this watch
  2. BZelos Thresher 41mm DuskW +0.2 · L2L same · T −0.1 mm
  3. CSeiko SRPG05W +0.2 · L2L same · T −0.8 mm
  4. DSeiko SRPD37W −0.3 · L2L +0.5 · T −1 mm

Differences against A in mm: W case width, L2L lug to lug, T thickness. Nearest by width and length together, from the published sizes.

Seiko SSA425 questions

How big is the Seiko SSA425?

The Seiko SSA425 measures 40.8 mm across, 47 mm lug to lug, 12.8 mm thick, 140 g.

Will the Seiko SSA425 fit a 6.5-inch wrist?

Balanced: the Seiko SSA425's 47 mm lug to lug takes 88% of the ~53.3 mm flat top of a 6.5-inch (16.5 cm) wrist. By the same estimate (circumference ÷ 3.1) it sits balanced from about 16.5 cm and overhangs the flat top on wrists under about 15 cm.

What strap size does the Seiko SSA425 take?

The Seiko SSA425 measures 20 mm between the lugs, so it takes a 20 mm strap with 20 mm spring bars. 62 other models in our base share that width.

Find the strap length for your wrist and the Seiko SSA425 in the watch strap size tool.

More Seiko watches

Sources

Documents checked · Report a wrong number

  1. 1Seiko Watch Corporation — SSA425 product page (Presage), seikowatches.com us-en · html · read