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Seiko watch · Presage · automatic

Seiko SRPG05

The Seiko SRPG05 measures 41 mm across, 47 mm lug to lug, and 12 mm thick. It fits wrists from ~16.5 cm (flat-fit estimate).

Sources checked · How we source numbers
Case
41 mm1
Lug to lug
47 mm1
Thickness
12 mm1
Lug width
not published by Seiko
Seiko SRPG05: size drawingSeiko SRPG05, round case, top and side view to scale: case diameter 41 mm, lug to lug 47 mm, lug width — (unknown), thickness 12 mm, rotating bezel. Bezel, dial and crown size are schematic.lug width —Ø 41lug to lug 47TOPthickness 12SIDE
Seiko SRPG05, top and side, to scaleDrawing from data, not a photo · mm

Seiko SRPG05 specifications

Case diameter
41 mm1seller listing
Lug to lug
47 mm1seller listing
Thickness
12 mm1seller listing
Lug width
not published by Seiko
Crystal
Mineral glass1seller listing
Water resistance
50 m1seller listing
Movement
Seiko 4R351seller listing · automaticSeiko 4R35 specs
Battery
none: the Seiko 4R35 is automatic
Years made
start not published
Case code
not in our data yet
Bezel
unidirectional rotating1seller listing

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 SRPG05: wrist fitSeiko SRPG05 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 SRPG05 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 SRPG05 at 1:1, next to a millimetre ruler.

1:1 · not calibrated: sizes are approximate
Seiko SRPG05: size drawingSeiko SRPG05, round case, top and side view to scale: case diameter 41 mm, lug to lug 47 mm, lug width — (unknown), thickness 12 mm, rotating bezel. Bezel, dial and crown size are schematic.lug width —Ø 41lug to lug 47TOPthickness 12SIDE
Drawing from data, not a photo · mm
01020304050

Seiko SRPG05 strap size

Seiko publishes no lug width for the Seiko SRPG05. Measure between the lugs with a caliper before buying a third-party strap.

Attachment: not published in our sources.

Find your strap length in the watch strap size tool, with the Seiko SRPG05 filled in.

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

Movement: Seiko 4R35

The Seiko SRPG05 runs on the Seiko 4R35, an automatic movement. 25 other models in our base use it.

Beat rate
21,600 bph2
Power reserve
41 h2
2 sources disagree; show every value
  • manufacturer 41 h2
  • secondary source 40, 41 h4
Jewels
232
2 sources disagree; show every value
  • manufacturer 232
  • secondary source 23, 244
Accuracy
−35 to +45 s/day3
Hacking seconds
Yes2
Hand winding
Yes2

Battery

none: the Seiko 4R35 is automatic

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

Same size as the Seiko SRPG05

The models nearest to the Seiko SRPG05 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 SRPG05, Seiko SRPG03, Seiko SRPG07, Seiko SRPG09Top-view outlines to scale on one centre. A Seiko SRPG05: Ø 41, L2L 47, lug —, T 12. B Seiko SRPG03: Ø 40.8, L2L 47, lug 20, T 12 (vs A: Ø −0.2 L2L 0 T 0). C Seiko SRPG07: Ø 40.8, L2L 47, lug 20, T 12 (vs A: Ø −0.2 L2L 0 T 0). D Seiko SRPG09: Ø 40.8, L2L 47, lug 20, T 12 (vs A: Ø −0.2 L2L 0 T 0).B Ø 40.8C Ø 40.8D Ø 40.8A Ø 41A L2L 47B L2L 47C L2L 47D L2L 47A Seiko SRPG05Ø 41 · L2L 47 · lug — · T 12B Seiko SRPG03Ø 40.8 · L2L 47 · lug 20 · T 12vs A: Ø −0.2 L2L 0 T 0C Seiko SRPG07Ø 40.8 · L2L 47 · lug 20 · T 12vs A: Ø −0.2 L2L 0 T 0D Seiko SRPG09Ø 40.8 · L2L 47 · lug 20 · T 12vs A: Ø −0.2 L2L 0 T 0
A Seiko SRPG05 and the 3 nearest in size, on one centre, to scaleDrawing from data, not a photo · mm

Nearest in size

  1. ASeiko SRPG05this watch
  2. BSeiko SRPG03W −0.2 · L2L same · T same mm
  3. CSeiko SRPG07W −0.2 · L2L same · T same mm
  4. DSeiko SRPG09W −0.2 · L2L same · T same 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.

Same movement: Seiko 4R35

All 26 models on the Seiko 4R35

Seiko SRPG05 questions

How big is the Seiko SRPG05?

The Seiko SRPG05 measures 41 mm across, 47 mm lug to lug, 12 mm thick.

Will the Seiko SRPG05 fit a 6.5-inch wrist?

Balanced: the Seiko SRPG05'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.

Does the Seiko SRPG05 need a battery?

No. The Seiko SRPG05 has no cell to replace: a wound mainspring drives its automatic Seiko 4R35.

What movement is in the Seiko SRPG05?

The Seiko SRPG05 runs on the Seiko 4R35, an automatic movement.

More Seiko watches

Sources

Documents checked · Report a wrong number

  1. 1Right Time International — SRPG05 listing, Right Time (Denver), dealer spec block (listing, sold out) · html · read
  2. 2Seiko Watch Corporation — Instructions: Seiko Automatic Diver's Watch Cal. 4R15/4R16/4R35/4R36/7S26/7S35/7S36 (English) · pdf · read
  3. 3Seiko Watch Corporation — Instructions: Diver's Watch for Air Diving, Cal. 4R35 / 4R36 (English) · pdf · read
  4. 4Grail Watch — Grail Watch Reference: Seiko Cal. 4R35 · html · read
  5. 5Seiko Watch Corporation — Instructions: Mechanical watch, Cal. 4R35 / 4R36 / 4R37 / 4R38 / 4R71 / 4R72 / 4R39 (English) · pdf · read