RC1632 Alpinist Style Case Black Chapter Ring - Steel
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The RC1632 is the steel Alpinist with an installed black chapter ring and a polished bezel over a brushed case — a bold, refined contrast. A pre-installed scratch-resistant flat sapphire crystal completes it. Fits 7S, 4R, and NH (NH35 / NH36 / NH38) movements and a 28.5mm dial — a versatile, robust base for a standout build.
Quick specs
| Diameter | 41.3mm (without crown) / 43.2mm (with crown) |
| Lug-to-lug | 46.4mm |
| Thickness | 12.2mm (incl. case cover) |
| Lug width | 20mm |
| Material | 316L stainless steel |
| Finish | Brushed steel, polished bezel |
| Crystal | Flat sapphire |
| Chapter ring | Black |
| Crown | Sterile, 1-piece stem for NH movement (5.9mm × 3.7mm) |
| Movement fit | 7S / 4R / NH35 / NH36 / NH38 |
| Dial fit | 28.5mm |
The case includes:
1. Brushed steel case with polished bezel
2. Pre-installed flat sapphire crystal
3. Installed black chapter ring
4. Sterile crown (1-piece stem, for NH movement)
5. Slim case cover (Solid or Sapphire — your choice)
6. 20mm spring bars
Matching bracelets (sold separately):
1. SB1244 Seiko Alpinist (SARB017) Jubilee Bracelet – Steel
2. SB1245O Seiko Alpinist (SARB017) Oyster Bracelet – Steel
3. SB1245P Seiko Alpinist (SARB017) President Bracelet – Steel
Buying options: Case Cover — Slim Solid Case Cover, or Slim Sapphire Case Cover (shows the movement; added cost).
Compatibility: Built for 7S, 4R, and NH movements (NH35 / NH36 / NH38) and a standard 28.5mm dial. Fits any 20mm strap or bracelet. See all movements.
