One of Holden’s Grails
Grand Seiko Automatic GMT
The Grand Seiko Automatic GMT (SBGM221) is a GMT travel watch from Grand Seiko: a 39.5 mm stainless steel case, 13.7 mm thick and 46.9 mm lug to lug, with an automatic 9S66 movement.
Going by its 46.9 mm lug to lug, it should sit within the flat top of a wrist of about 6.4 inches (16.2 cm) or larger.
Research found it at $5,400 list in the US (checked August 2026), about $4,200 on the street (August 2026) and about $3,750–3,850 used (July 2026).
Specifications
From the research, with the sources for each group of facts. Unknown means no source confirmed it.
| The watch [1][2] | |
|---|---|
| Brand | Grand Seiko |
| Reference | SBGM221 |
| Category | GMT / Travel |
| Production | Current (introduced 2017) |
| Case and size [1][2] | |
| Case diameter | 39.5 mm |
| Lug to lug | 46.9 mm |
| Thickness | 13.7 mm |
| Lug width | 19 mm |
| Case material | Stainless steel |
| Crystal | Box-shaped sapphire with anti-reflective inner coating |
| Water resistance | Splash resistant (official) |
| Weight | 88 g |
| Movement [1][2][3] | |
| Movement | 9S66, automatic |
| Power reserve | Approx. 72 hours (3 days) |
| Accuracy | +5 to -3 s/day mean daily rate (static); +10 to -1 s/day normal usage (official) |
| Bracelet [1][2] | |
| Bracelet or strap | Brown crocodile leather strap with red-tinted stitching (editorial), 19 mm |
| Clasp | Three-fold deployant with push-button release |
| Price and warranty (US) [1][2][3][4] | |
| List price (US) | $5,400 (official US page, 2026-08) |
| Street price (US) | ~$4,200 average Chrono24 ask (range ~$3,600–4,600) (August 2026) |
| Used price (US) | $3,750–3,850 recent marketplace sales for great-condition full sets (WatchCharts) (July 2026) |
| Warranty | Unknown |
Will it fit?
A watch wears comfortably when its lugs stay on the flat top of the wrist. Here is the 46.9 mm lug to lug against the flat top estimated for common wrist sizes.
| Wrist | Flat top | Fit |
|---|---|---|
| 6 in 15.2 cm | 47 mm | At the edge |
| 6.5 in 16.5 cm | 51 mm | Comfortable |
| 7 in 17.8 cm | 55 mm | Comfortable |
| 7.5 in 19.1 cm | 59 mm | Comfortable |
| 8 in 20.3 cm | 63 mm | Comfortable |
Check it against your own wrist An estimate, not a guarantee; how the method works is on the tool page.
What the research found
These are the research’s judgments, scored against Holden’s priorities, not his own words.
Strengths
- True traveler (flyer) GMT: independent local hour hand with linked date [1][2]
- Hand-finished markers, diamond-cut hands, hand-blued GMT hand — execution rare at ~$3,800 used [2]
- Rare elegant expression of the GMT complication versus sporty norms [2][3]
- 72 h 9S66 with strong rate spec [1]
Weaknesses
- Splash-resistant only — a real constraint for a travel watch [1]
- 13.7 mm thick for an elegance piece [1]
- 19 mm lug width limits straps [2]
- No quickset date [2]
Research scores, 0 to 10
| Execution and feel in the hand | 8.8 |
|---|---|
| Design identity | 8.6 |
| Value at a realistic price | 8.6 |
| Long-term ownership | 8.2 |
| Movement and engineering | 8.6 |
| Wearability and proportions | 7.4 |
| Versatility and durability | 6.3 |
| Fit with Holden's collection | 7.0 |
Also on Holden’s list
Other gmt / travel watches on his list.
- NOMOS Glashütte Club Sport neomatik Worldtimer 790.S4
- Grand Seiko Spring Drive GMT 'Mist Flake' SBGE285
- Seiko Field GMT HDB002
- San Martin Titanium GMT 39mm SN0121TF
- Mido Ocean Star GMT M026.629.11.051.01
Sources
- SBGM221 — official product page grand-seiko.com · read August 26, 2026
- Grand Seiko SBGM221 Review: The Best GMT Grand Seiko Has Made? exquisitetimepieces.com · read August 26, 2026
- Grand Seiko SBGM221 GMT Review teddybaldassarre.com · read August 26, 2026
- Grand Seiko Automatic GMT SBGM221 price overview (July 2026) watchcharts.com · read August 26, 2026
Personal research, not a source of truth. Spotted an error? Email a correction.