Seiko
Seiko 5 Sports Automatic Japan Made SNZB23J1 Men's Watch
A Japanese-made automatic sports watch with a 39.00 mm stainless steel case, Hardlex crystal, 100 m water resistance and a 23-jewel 7S36 movement
- StyleSports
- MaterialStainless Steel
- MovementAutomatic
- ShapeRound
- Dial ColorBlack
- Dial MarkersIndex
- Japan-made automatic calibre 7S36 with 23 jewels
- 100 m water resistance suits swimming and snorkelling
- Hardlex crystal protects the black dial from daily knocks
- Stainless steel case and bracelet with deployment clasp
- Unidirectional bezel times dives and intervals reliably
Japan-Made Automatic Sports Watch
The Seiko 5 Sports SNZB23J1 is a Japan-made automatic wristwatch built for daily wear. Its stainless steel case and bracelet house a 23-jewel 7S36 calibre that winds from wrist motion. A unidirectional bezel and 100 m water resistance suit active use, while the black dial shows day and date at three o'clock.
Sustained Daily Operation
The automatic movement runs continuously while worn, storing roughly 36 hours of power reserve when activity stops. Hardlex crystal protects the dial from everyday knocks, and the screw-down crown maintains the 100 m rating during swimming or showering. No battery changes are required, so long-term reliability depends on regular wear or occasional manual winding.
Straightforward Strap Adjustment
The stainless steel bracelet uses a deployment clasp with push-button release for secure one-handed fastening. Links must be removed with a pin tool or by a watchmaker to fit smaller wrists, which is the most common fit issue. The 39.00 mm case thickness sits close to the wrist, reducing snag risk under cuffs. Buyers needing a lighter titanium case or a rubber strap for extreme sports should look elsewhere.
Highlights
- Japan-made automatic calibre 7S36 with 23 jewels
- 100 m water resistance suits swimming and snorkelling
- Hardlex crystal protects the black dial from daily knocks
- Stainless steel case and bracelet with deployment clasp
- Unidirectional bezel times dives and intervals reliably
Specifications
| Brand | Seiko |
|---|---|
| Style | Sports |
| Material | Stainless Steel |
| Movement | Automatic |
| Shape | Round |
| Dial Color | Black |
| Dial Markers | Index |
| Display | Analog |
| Date | Date |
| Band Material | Stainless Steel |
| Fastener | Deployment Clasp |
| Gender | Male |
| Condition | New |
| Bezel | Unidirectional Bezel |
| Case Material | Stainless Steel |
| Case Thickness | 39.00 mm |
| Crystal | Hardlex Crystal |
| Water-Resistant | 100m |
| Special Features | Hardlex Crystal,Deployment Clasp,Day and Date Display |
Questions about this item
Does the 7S36 automatic movement generate noticeable heat or noise when worn all day?
The 7S36 automatic calibre runs from wrist motion, so it produces no audible rotor whine and no measurable heat on the wrist during continuous daily wear.
What strap tools or spring bars are required to adjust the stainless steel bracelet with its deployment clasp?
The bracelet uses standard spring bars; a fine spring-bar tool lets you remove links for sizing without any proprietary parts.
Will the 39.00 mm case and Hardlex crystal sit flush under the cuff of an older dress shirt?
At 39.00 mm diameter the case profile is slim enough to slide under most traditional shirt cuffs without catching on the Hardlex crystal.
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