Seiko
Presage Classic Series HCC001
Seiko
HCC001
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Details & Specifications
Description
The Seiko Presage Classic Series HCC001 — known by its Japanese name "Shironeri" (白練), meaning the pristine white achieved through the careful refining of silk threads — is a quietly compelling dress watch that translates one of Japan's most treasured textile traditions into a finely crafted timepiece. Its dial features a subtle, wavy concentric guilloché-like texture, stamped to evoke the graceful drape and smooth sheen of finely woven Tomioka silk from Gunma Prefecture. Depending on the angle and quality of light, the dial shifts and shimmers, creating an ever-changing visual depth that rewards careful attention.
The 38mm stainless steel case with Seiko's super-hard Diashield coating occupies a smart middle ground between the brand's 36mm dress pieces and larger sport-oriented references, while polished case sides, brushed lug tops, and a fully polished stepped bezel give the watch a refined, considered finish. A seven-row alternating brushed-and-polished steel bracelet completes an exceptionally cohesive look.
Through the see-through exhibition screw case back, Seiko's in-house Calibre 6R51 is visible, beating at 21,600 vph with a generous 72-hour power reserve. A portion of proceeds from the HCC001 supports the Tomioka Silk Promotion Organization, dedicated to preserving Japan's silk heritage. This example presents in like new condition with full box and papers.
Specifications:
| Movement | |
| Type | Automatic with Manual Winding |
| Calibre | 6R51 |
| Functions | Hours, Minutes, Seconds (stop-second function) |
| Frequency | 21,600 vph (3 Hz) |
| Power Reserve | Approx. 72 hours (3 days) |
| Jewels | 24 |
| Precision | +25 to -15 seconds per day |
| Case | |
| Case Material | Stainless Steel with Super-Hard Diashield Coating |
| Case Diameter | 38.0 mm |
| Case Thickness | 12.9 mm |
| Lug-to-Lug | 43.8 mm |
| Lug Width | 20 mm |
| Water Resistance | 10 bar / 100m |
| Magnetic Resistance | 4,800 A/m |
| Crystal | Dual-curved sapphire crystal with anti-reflective coating on inner surface |
|
Case Back |
See-through screw exhibition case back |
|
Dial |
Shironeri white with wavy concentric silk-inspired texture; applied indices and hands |
| Bracelet / Strap | |
| Material | Seven-row stainless steel bracelet with alternating brushed and polished links; super-hard coating |
|
Clasp |
Deployment clasp with push-button release |
| Additional Details | |
| Collection | Presage Classic Series — Tomioka Silk |
| Release | July 2026 |

