Grand Seiko Masterpiece Collection
Grand Seiko's top tier, produced by the Micro Artist Studio (Spring Drive, Shiojiri) and Atelier Ginza (high-complication mechanical, Tokyo).
6 references
“Differs” marks a spec with different recorded values. — means not recorded.
| Spec | SBGD001 Spring Drive 8 Days (original) | SBGD201 Spring Drive 8 Days | SBGZ003 Spring Drive manual-wind, platinum | SLGT003 Kodo Constant-Force Tourbillon | SBGD228 Spring Drive 8 Days 'Red Lion' jewelry watch | SBGZ011 Manual-wind Spring Drive, hand-engraved dial |
|---|---|---|---|---|---|---|
| Case size Differs | 43 mm | 43 mm | 38.5 mm | 43.8 mm | 44.5 mm | 40 mm |
| Lug to lug Differs | Not recorded | 51.8 mm | 43.7 mm | Not recorded | 52 mm | 45.2 mm |
| Thickness Differs | Not recorded | 13.2 mm | 9.8 mm | Not recorded | 14.4 mm | 9.6 mm |
| Lug width Differs | 22 mm | 22 mm | 19 mm | Not recorded | 23 mm | 19 mm |
| Case Differs | Platinum 950, round | Platinum 950, round | Platinum 950, round | Platinum 950, round | 18k rose gold, round | Platinum 950, round |
| Bezel Differs | platinum fixed | platinum fixed | platinum fixed | platinum fixed | 18k rose gold, gem-set fixed | platinum fixed |
| Crystal Differs | sapphire, anti-reflective coating | sapphire, anti-reflective coating | Dual-curved sapphire, anti-reflective coating | sapphire, anti-reflective coating | Dual-curved sapphire, anti-reflective coating | sapphire, anti-reflective coating |
| Water resistance | 100 m | 100 m | Not recorded | Not recorded | 100 m | Not recorded |
| Caliber Differs | 9R01 | 9R01 | 9R02 | 9STI | 9R01 | 9R02 |
| Movement maker Differs | Seiko Epson | Seiko Epson | Seiko Epson | Seiko Watch Corporation (Atelier Ginza) | Seiko Epson | Seiko Epson |
| Movement type Differs | Spring Drive | Spring Drive | Spring Drive | Manual | Spring Drive | Spring Drive |
| Jewels Differs | 50 | 56 | Not recorded | 44 | 56 | Not recorded |
| Frequency | Not recorded | Not recorded | Not recorded | 28800 vph | Not recorded | Not recorded |
| Power reserve Differs | 192 h | 192 h | 84 h | 72 h | 192 h | 84 h |
| Complications Differs | power_reserve_indicator | power_reserve_indicator, time_difference_adjustment | power_reserve_indicator | tourbillon, constant_force | power_reserve_indicator, time_difference_adjustment | power_reserve_indicator |
| Dial Differs | White, 'Diamond Dust' texture | Multi-layered silvery-white, 'diamond dust' texture achieved without white paint | Light gray | Not recorded | Wine-red mother-of-pearl with diamonds and garnets | Gray, hand-engraved textured surface |
| Indices | Not recorded | Not recorded | Not recorded | Not recorded | Not recorded | applied, 14k white gold |
| Hands | Not recorded | Not recorded | Not recorded | Not recorded | Not recorded | 14k white gold |
| Bracelet Differs | crocodile leather strap | crocodile leather strap, platinum folding clasp | crocodile leather strap, platinum folding clasp | crocodile leather strap | crocodile leather strap (with alternative KYOTO Leather strap included) | crocodile leather strap, platinum clasp with 18k white gold accents |
| Produced Differs | 2016–2017 | 2022 | 2022 | 2022 | 2026 | 2026 |
| Limited edition Differs | Not recorded | Not recorded | Not recorded | Not recorded | 8 pieces | 50 pieces |