Grand Seiko Sport Collection homages
Sport Collection GMT and professional diver designs.
43.8 mm across2 homages
See two to start with
How to recognise one
Six marks make the look. The count says how many of the 2 homages keep each one.
Rotating dive bezel
1 of 2 keep it, 1 not compared yet. A black bezel with a lume pip at 12 and numerals every ten minutes.
Triangle at 12
A lumed triangle at 12 points to the centre of the dial.
Round hour plots
Lumed circles mark most of the hours.
Faceted hands
The hour and minute hands are polished with angular facets.
Date at 3
A date window with a thin frame sits at 3.
Crown guards
The case swells into shoulders either side of the crown.
Each close-up covers about 12.5 mm of watch, using the listed case width and estimated photo edges.
Two to start with
Picked from the record by marks kept, price and size, each sold under its own maker's name, not as a Grand Seiko.
San Martin SN0009 Grand Seiko-style diver
about £231 €269, seen 2 Oct40 mm
Closest look. Keeps 1 of the 6 marks of the Grand Seiko, more than any other homage here.
Seestern S456 GMT
41 mm
41 mm across, NH34.
Price not listed yet
Original specifications
Sizes and specifications apply to the version named below. Other versions can differ.
SBGJ239
Exact reference SBGJ239 supplied by assignment.
| Specification | Value | Sources and notes |
|---|---|---|
| Case width | 44.2 mm | SBGJ239 | Grand SeikoGrand Seiko SBGJ239 | TheSeikoGuy Sources agree. The body-read sources SBGJ239 | Grand Seiko, Grand Seiko SBGJ239 | TheSeikoGuy identify reference SBGJ239 and agree on case width mm at 44.2 mm. Diameter as explicitly labeled by both sources. |
| Lug to lug | 50.6 mm | SBGJ239 | Grand SeikoGrand Seiko SBGJ239 | TheSeikoGuy Sources agree. The body-read sources SBGJ239 | Grand Seiko, Grand Seiko SBGJ239 | TheSeikoGuy identify reference SBGJ239 and agree on lug to lug mm at 50.6 mm. |
| Thickness | 14.4 mm | SBGJ239 | Grand SeikoGrand Seiko SBGJ239 | TheSeikoGuy Sources agree. The body-read sources SBGJ239 | Grand Seiko, Grand Seiko SBGJ239 | TheSeikoGuy identify reference SBGJ239 and agree on thickness mm at 14.4 mm. |
| Lug width | 21 mm | SBGJ239 | Grand SeikoGrand Seiko SBGJ239 | TheSeikoGuy Sources agree. The body-read sources SBGJ239 | Grand Seiko, Grand Seiko SBGJ239 | TheSeikoGuy identify reference SBGJ239 and agree on lug width mm at 21 mm. Grand Seiko labels band width; independent source labels lug width. |
| Movement calibre | 9S86 | SBGJ239 | Grand SeikoGrand Seiko SBGJ239 | TheSeikoGuy Sources agree. The body-read sources SBGJ239 | Grand Seiko, Grand Seiko SBGJ239 | TheSeikoGuy identify reference SBGJ239 and agree on movement calibre at 9S86. |
| Case material | Stainless steel | SBGJ239 | Grand SeikoGrand Seiko SBGJ239 | TheSeikoGuy Sources agree. The body-read sources SBGJ239 | Grand Seiko, Grand Seiko SBGJ239 | TheSeikoGuy identify reference SBGJ239 and agree on case material at Stainless steel. |
| Water resistance | 200 m | SBGJ239 | Grand Seiko One primary source. Grand Seiko states 20 bar. |
| Power reserve | 55 hours | SBGJ239 | Grand SeikoGrand Seiko SBGJ239 | TheSeikoGuy Sources agree. The body-read sources SBGJ239 | Grand Seiko, Grand Seiko SBGJ239 | TheSeikoGuy identify reference SBGJ239 and agree on power reserve hours at 55 hours. |
Sources and unconfirmed details
- No conflict-free observed weight; page output did not confirm the official 122 g figure on an independent source.
- SBGJ239 | Grand Seiko, read 2026-10-07
- Grand Seiko SBGJ239 | TheSeikoGuy, read 2026-10-07
SBGH289GShown in the photograph
Measurements belong only to the photographed SBGH289G. Other family references are not interchangeable.
| Specification | Value | Sources and notes |
|---|---|---|
| Case width | 43.8 mm | SBGH289G specifications One primary source. Japanese maker boutique body states SBGH289 and all four dimensions; G is the international suffix for pictured SBGH289G, not a different case size. |
| Lug to lug | 51 mm | SBGH289G specifications One primary source. Japanese maker boutique body states SBGH289 and all four dimensions; G is the international suffix for pictured SBGH289G, not a different case size. |
| Thickness | 14.7 mm | SBGH289G specifications One primary source. Japanese maker boutique body states SBGH289 and all four dimensions; G is the international suffix for pictured SBGH289G, not a different case size. |
| Lug width | 22 mm | SBGH289G specifications One primary source. Japanese maker boutique body states SBGH289 and all four dimensions; G is the international suffix for pictured SBGH289G, not a different case size. |
| Movement calibre | 9S85 | SBGH289G specifications One primary source. Japanese maker boutique body states SBGH289 and all four dimensions; G is the international suffix for pictured SBGH289G, not a different case size. |
| Water resistance | 200 m | SBGH289G specifications One primary source. Japanese maker boutique body states SBGH289 and all four dimensions; G is the international suffix for pictured SBGH289G, not a different case size. |
| Power reserve | 55 hours | SBGH289G specifications One primary source. Japanese maker boutique body states SBGH289 and all four dimensions; G is the international suffix for pictured SBGH289G, not a different case size. |
Sources and unconfirmed details
- SBGH289G specifications, read 2026-10-07
More about the Sport Collection
Lay a homage over the Grand SeikoAny of the 2, laid over the original at one scale
Lay a homage over the Grand Seiko
Slide to fade from one watch to the other and compare the case shapes. The figures below describe the version shown in the photograph.
43.8Grand Seiko Sport Collection
40San Martin SN0009 Grand Seiko-style diver
41Seestern S456 GMTPhotos 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.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.
Grand Seiko Sport Collection photo: SBGH289G. San Martin SN0009 Grand Seiko-style diver photo: SN0009-G-D blue dial, black bezel.41 mm, 2.8 mm narrower than the Grand Seiko
Grand Seiko Sport Collection photo: SBGH289G. Seestern S456 GMT photo: S456 GMT light blue pearl dial.
SBGH289G, specifications and sources
| Measure | Grand Seiko | San Martin SN0009 Grand Seiko-style diver |
|---|---|---|
| Case width | 43.8 mm | 40 mm |
| Lug to lug | 51 mm | 46.5 mm |
| Thickness | 14.7 mm | 13.1 mm |
| Lug width | 22 mm | 20 mm |
| Movement | 9S85 | YN55A |
| Power reserve | 55 hours | Not listed yet |
| Water | 200 m | 300 m |
| Price | Not tracked here | about £231 €269, seen 2 Oct |
Side view
Copies
- Rotating dive bezel
Not compared yet
Gives it away
No difference noted