SEIKO PROSPEX SNJ025 : SOLAR TUNA

SEIKO Prospex Solar Analog-Digital Diver – SNJ025 (Solar Tuna)

The SEIKO Prospex SNJ025 is a solar-powered analog-digital diver’s watch that combines classic professional dive watch design with modern hybrid functionality. Among Seiko fans, this model is often referred to as the “Solar Tuna” thanks to its iconic shroud-style diver look and rugged tool-watch presence.

Design Overview

The SNJ025 features a black dial with highly legible LumiBrite hands and markers, paired with a black one-way rotating elapsed timing bezel. Its lightweight matte black case is built for comfort and durability, while the black silicone strap provides flexibility for active, everyday wear.

Key Features

• Solar-powered analog-digital movement (Caliber H851)
• Stopwatch function
• Alarm function
• Dual analog and digital displays
• Local time indication mode
• LumiBrite hands and markers
• Black one-way rotating elapsed timing bezel
• Screwdown crown, pushers, and caseback

Case & Exterior

• Case: Lightweight matte black case
• Crystal: Hardlex crystal
• Dial Color: Black
• Bezel: Black one-way rotating elapsed timing bezel

Case Dimensions

• Diameter: 47.8 mm
• Thickness: 13.75 mm
• Length: 50.5 mm

Movement & Power

• Movement: Solar Analog-Digital
• Caliber: H851
• Power Source: Powered by light energy (no battery change required)
• Power Reserve: 6-month power reserve once fully charged

Strap & Fit

• Strap: Black silicone strap
• Lug Width: 22 mm

Water Resistance

• Water Resistance: 200 meters (660 feet)
• Follows ISO standards and is suitable for scuba diving

Summary

The SEIKO Prospex SNJ025 is a rugged, reliable solar diver’s watch that blends analog readability with digital functionality. Often called the “Solar Tuna” by enthusiasts, it delivers a bold tool-watch design with practical features like stopwatch, alarm, and a 6-month power reserve when fully charged—plus 200m water resistance suitable for scuba diving.

For more details, visit the official Seiko website.

Warranty

This watch comes with Seiko’s official 3-year warranty, offering peace of mind and long-term reliability.

▶︎ Processing Time & Shipping Policy
▶︎ Refund Policy
We only carry Seiko USA products.
Unfortunately, we DO NOT ship internationally.