SEIKO PROSPEX Alpinist Automatic Men's Watch SPB117J1

Items Description

The Seiko PROSPEX Alpinist SPB117J1 is a automatic field watch designed for hikers, mountaineers, and outdoor professionals who require reliable timekeeping in demanding environments. Building on the lineage of Seiko's first sports watch, the 1959 Laurel Alpinist, this model combines a compact stainless steel case with a sapphire crystal and an inner rotating compass bezel, positioning it as a practical instrument for navigation and daily wear.

 

At 39.5mm in diameter and 13.2mm thick, the SPB117J1 sits comfortably on a wide range of wrist sizes, with a lug-to-lug measurement of 46.4mm that keeps the profile balanced and wearable. The stainless steel case houses a black dial with luminous indices and hands, while the sapphire crystal with magnifier ensures legibility of the date window at 3 o'clock. Powered by an automatic movement with manual winding capability, 24 jewels, and a stop seconds function, this Alpinist is built to transition from mountain trails to city streets without compromise.

 

Key Advantages of the SEIKO PROSPEX Alpinist Automatic Men's Watch SPB117J1 – Stainless Steel Case, Sapphire Crystal, 200m Water Resistance, Black Dial

 

1. Automatic Movement with Manual Winding and Stop Seconds

The SPB117J1 runs on a Seiko automatic caliber that also supports manual winding, allowing the wearer to top up the mainspring by hand when the watch is not being worn. The 24-jewel movement includes a stop seconds function for precise time setting, a practical detail for users who synchronise their watch with reference clocks or navigation instruments.

 

• Self-winding: Worn on the wrist, the motion of the arm powers the mainspring.
• Manual winding: Crown can be turned to wind the movement when off the wrist.
• Stop seconds: Hacking function enables exact time alignment.
• 24 jewels: Reduces friction at key pivot points for consistent operation.

 

2. Stainless Steel Case with Sapphire Crystal and Magnifier

The 39.5mm stainless steel case is paired with a sapphire crystal, a material chosen for its resistance to everyday scratches. A magnifier over the date window at 3 o'clock enlarges the numeral for quick reading. With a thickness of 13.2mm and a lug-to-lug of 46.4mm, the case dimensions keep the watch proportionate on the wrist while accommodating the internal rotating bezel mechanism.

 

• Case diameter: 39.5mm, suitable for medium to large wrists.
• Case thickness: 13.2mm, accounting for the automatic movement and bezel system.
• Crystal: Sapphire with magnifier over the date aperture.
• Case material: Stainless steel with a brushed and polished finish.

 

3. Inner Rotating Compass Bezel for Navigation

A signature element of the Alpinist line, the inner rotating compass bezel allows the wearer to determine direction using the sun's position and the watch's hour hand. The bezel is operated by a secondary crown at 4 o'clock, keeping the main crown at 3 o'clock free for winding and time setting. This layout maintains a clean dial profile while providing a functional navigation aid for hiking and orienteering.

 

• Compass bezel: Inner rotating ring with cardinal and intercardinal markings.
• Second crown: Positioned at 4 o'clock to control the bezel.
• Field utility: Supports direction finding when used with the sun and hour hand.

 

4. Black Dial with Luminous Indices and Hands

The black dial provides high contrast against the stainless steel case and serves as a neutral backdrop for the applied indices and hands. Luminous material on the hour markers and hands supports readability in low-light conditions, whether on an early morning trail or in a dimly lit room. A date window at 3 o'clock adds daily practicality, while the dial's layout remains uncluttered despite the compass bezel mechanism beneath the crystal.

 

• Dial colour: Black with subtle texture.
• Luminescence: Coated indices and hands for low-light visibility.
• Date display: Located at 3 o'clock with magnifier.

 

5. 200m Water Resistance and Daily Durability

With a water resistance rating suitable for swimming and snorkelling, the SPB117J1 is designed to handle rain, splashes, and immersion without issue. The stainless steel case and screw-down case back contribute to the watch's overall robustness, making it a viable option for outdoor activities where moisture and dust are present.

 

• Water resistance: Rated for swimming and snorkelling.
• Case back: Screw-down design for added sealing.
• Durability: Stainless steel construction with sapphire crystal protection.

 

6. Compact Case Dimensions for All-Day Wear

The 39.5mm diameter and 46.4mm lug-to-lug measurement place the SPB117J1 in a wearable size range that suits both outdoor use and office settings. The 13.2mm thickness accommodates the automatic movement and inner bezel without creating excessive bulk under a sleeve. This balance of dimensions allows the watch to function as a daily companion rather than a dedicated tool worn only on excursions.

 

• Diameter: 39.5mm for broad wrist compatibility.
• Lug-to-lug: 46.4mm for a balanced profile.
• Thickness: 13.2mm with automatic movement and bezel system.

 

The Seiko PROSPEX Alpinist SPB117J1 is best suited for hikers, campers, and outdoor enthusiasts who want a mechanical watch with navigation features and robust construction. Its stainless steel case, sapphire crystal, automatic movement with manual winding, and inner compass bezel make it a practical choice for users who value field functionality in a compact, everyday-wearable package.

Specifications of SEIKO PROSPEX Alpinist Automatic Men's Watch SPB117J1

Brand Name	Seiko
Model number	SPB117J1
Part Number	SPB117J1
Item Shape	Round
Dial window material type	Hardlex
Clasp	Push Button Deployment Clasp
Case material	Stainless Steel
Case diameter	41 millimeters
Case Thickness	13 millimeters
Band width	20 millimeters
Calendar	Date
Movement	Japanese Automatic
Water resistant depth	200 Meters
Display Type	Analog

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Specifications
[Brand Name ]	Seiko
[Model number ]	SPB117J1
[Part Number ]	SPB117J1
[Item Shape ]	Round
[ Dial window material type ]	Hardlex
[Clasp ]	Push Button Deployment Clasp
[Case material ]	Stainless Steel
[Case diameter ]	41 millimeters
[Case Thickness ]	13 millimeters
[Band width ]	20 millimeters
[ Calendar ]	Date
[ Movement ]	Japanese Automatic
[ Water resistant depth ]	200 Meters
[Display Type ]	Analog

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