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Seestern S456 GMT, light blue pearl dial
S456 GMT, light blue pearl dial

Seestern S456 GMT

A homage of the Grand Seiko Sport Collection

Price not listed yet

Size
41 mm across, 2.8 mm narrower than the Grand Seiko
Movement
NH34, automatic
Look
Not compared mark by mark yetFollows the SBGJ239
Gives it away
2.8 mm narrower than the Grand Seiko, 41 mm against 43.8 mm
Compare with another homage

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Homages of the Grand Seiko Sport Collection you can buy

Against the Grand Seiko

Grand Seiko Sport Collection SBGH289G43.8Grand Seiko Sport Collection SBGH289G
Seestern S456 GMT41Seestern S456 GMT

Photos use listed case widths and automatic case-edge readings. The readings have not been manually audited. Photo proportions stay unchanged. Perspective and lug length can differ.

41 mm, 2.8 mm narrower than the Grand Seiko
Grand Seiko Sport Collection SBGH289G photo: SBGH289G. Seestern S456 GMT photo: S456 GMT light blue pearl dial.

The Grand Seiko drawn is the SBGH289G. The S456 GMT follows the SBGJ239, so compare shape and size here.

What gives it away

  • 2.8 mm narrower than the Grand Seiko, 41 mm against 43.8 mm

  • Rotating dive bezel

    Not compared yet.

  • Triangle at 12

    Not compared yet.

  • Round hour plots

    Not compared yet.

  • Faceted hands

    Not compared yet.

  • Date at 3

    Not compared yet.

  • Crown guards

    Not compared yet.

Grand Seiko left, S456 GMT right.

Everything else

Every spec6 listed, each with where it came from

Every spec we have

From sellers. Each figure links to where it was found.

For the S456 light blue dial version.

Case width
41 mmsugesswatch.com, 2 Oct
Lug to lug
48.8 mmsugesswatch.com, 2 Oct
Lug width
20 mmsugesswatch.com, 2 Oct
Movement type
Automatic GMTsugesswatch.com, 2 Oct
Movement calibre
NH34sugesswatch.com, 2 Oct
Water resistance
200 msugesswatch.com, 2 Oct
The movementNH34, in plain words

The movement, in plain words

Seestern lists the NH34 for the S456 GMT. It is an automatic, so wearing it winds it.

On your wrist41 mm across, on a wrist your size

How it sits on your wrist

Set your wrist circumference to compare the 41 mm case with a schematic wrist. The ellipse estimates wrist width and shape. It cannot predict your fit.

17.0 cm6.7 in around

This wrist model is about 56 mm across. The case spans 73% of that estimated width. The lug span ends 3.7 mm inside each model edge. Thickness is unknown, so no case height is drawn.

Wrap a strip of paper round your wrist just below the bone, mark where it meets and measure it.

41 mm case 48.8 mm lug to lug Wrist model about 56 mm across
Schematic section, with a 10 mm grid. The ellipse approximates wrist anatomy from circumference. Your wrist shape, lug curve and fit will differ.
More from Seestern4 more on Bewrist

Every Seestern watch

Beside other Grand Seiko Sport Collection homagesThis watch and 1 more of its look, to scale

Drawn to scale by listed case width.

All 2 on the look page

SourcesThe 2 pages this record was built from