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Seiko Prospex "Arnie" Solar Analog-Digital Diver - SNJ025

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Seiko Prospex "Arnie" Solar Analog-Digital Diver - SNJ025

Big, black and packed with function, the Seiko Prospex Sea Solar Analog-Digital Diver (ref. SNJ025) combines analog hands with a digital LCD window on its black dial, wrapped in a black shroud and a black silicone strap. The 47.8mm case, made of stainless steel and plastic, gives it a commanding presence, while LumiBrite on the hands and indexes and a built-in LED light keep the display readable in the dark. A unidirectional rotating bezel finishes the purposeful diver's look.

Seiko's solar caliber H851 brings a full set of tools, including a chronograph that reads to 1/100 of a second across a span of up to 100 hours, a daily alarm and a full-auto calendar that stays correct through December 31, 2100. It also offers power save and battery life warning functions. A Hardlex crystal protects the dial, while a screw-down crown and screw case back secure 200 meters of diver's water resistance. At 114 grams on its silicone strap, it is a full-featured companion for long days by the water.

Features

  • Analog-digital display – analog hands paired with a digital LCD window.
  • Solar caliber H851 – with power save and battery life warning functions.
  • 1/100-second chronograph – measures elapsed time up to 100 hours.
  • Daily alarm and full-auto calendar – the calendar stays correct to December 31, 2100.
  • Built-in LED light – illuminates the display, alongside LumiBrite hands and indexes.

Specifications

  • Reference: SNJ025
  • Collection: Prospex Sea
  • Gender: Men's
  • Caliber Number: H851
  • Movement Type: Solar
  • Precision: ±15 seconds per month
  • Functions: Power save function, chronograph up to 100 hours in 1/100 second increments, alarm function (daily alarm), full-auto calendar correct to December 31, 2100, battery life warning function, LED (built-in illuminating light) function
  • Case Material: Stainless steel and plastic
  • Diameter: 47.8 mm
  • Thickness: 13.8 mm
  • Lug-to-Lug: 50.5 mm
  • Dial Color: Black (analog-digital with LCD window)
  • Crystal: Hardlex
  • LumiBrite: LumiBrite on hands and index(es)
  • Band: Black silicone strap
  • Distance Between Lugs: 22 mm
  • Water Resistance: 200m / 660ft diver's
  • Weight: 114.0 g
  • Features: Unidirectional rotating bezel, screw-down crown, screw case back

Timepiece History

Seiko's story began in 1881, when a 21-year-old entrepreneur, Kintaro Hattori, opened a shop selling and repairing watches and clocks in central Tokyo. The first watch to carry the Seiko name followed in 1924, and Seiko went on to introduce a long line of watchmaking firsts, including the Quartz Astron, the world's first quartz wristwatch, on December 25, 1969. In 2024, Seiko celebrated the 100th anniversary of the Seiko brand.

The SNJ025 belongs to the Prospex Sea line, a diver's watch lineage that traces back to 1965, when Seiko introduced Japan's first diver's watch, a self-winding model water resistant to 150 meters that was used on the 8th Japanese Antarctic Research Expedition in 1966. In 1975, Seiko's Professional Diver's 600M became the world's first diver's watch with a titanium case, and Seiko has continued to engineer its divers around the demands of real underwater conditions.

Seiko Prospex "Arnie" Solar Analog-Digital Diver - SNJ025

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