Seiko Sports 100, Ref. 7A48-7000, Cal. 7A48, Men’s Chronograph Vintage Watch, 1985

Seiko Sports 100 1985 — First impression - 7A48-7000

The Seiko Sports 100 Chronograph 7A48-7000 from 1985 stands as a highlight of Japanese horology in the quartz era. This model unites advanced functionality with a refined two-tone design, featuring a moonphase display, triple chronograph sub-dials, and an integrated bracelet. The stainless steel case with gold-plated accents offers both sporty resilience and a touch of luxury, while the Cal. 7A48 movement delivers the precision and reliability that defined Seiko’s innovation in the 1980s.

Seiko Sports 100 - Silver-White Dial

The silver-white dial blends classic Roman numeral hour markers with a detailed minute track and three neatly arranged chronograph registers. The moonphase aperture at 12 o’clock adds both visual charm and functional depth, while black hands contrast crisply against the dial for exceptional legibility.

Sports 100 7A48-7000 - Hands

The central timekeeping hands are slim black batons, proportioned for perfect balance with the Roman numerals. The chronograph’s central seconds hand is long and refined, while the sub-dial hands are kept minimal for clarity and precision timing.

Seiko Sports 100 7A48-7000 - Two-Tone Stainless Steel Case

The 39 mm stainless steel case is complemented by a polished gold-tone bezel and brushed side finishing, producing a distinctive contrast. Its robust construction is water-resistant, making it suitable for both everyday wear and careful collection display.

Sports 100 7A48-7000 - Crown

The original gold-plated crown is positioned at 8 o’clock, a unique signature of the 7A48 series. Two gold-plated pushers at 2 and 4 o’clock control the chronograph functions, with precise tactile feedback reflecting Seiko’s attention to detail.

Seiko Sports 100 - Integrated Two-Tone Bracelet

The integrated stainless steel bracelet features brushed outer links and polished gold-tone center links, ensuring a cohesive aesthetic that flows seamlessly from case to clasp. Its ergonomic design ensures long-wearing comfort and visual harmony.

Movement - Quartz Cal. 7A48 Precision

The Seiko Cal. 7A48 is one of the most advanced quartz chronograph calibers of its time, featuring 15 jewels and an integrated moonphase complication. With accuracy rated at ±15 seconds per month and a robust build, it remains a collectible and technically significant movement within the heritage of Japanese watchmaking.

Heritage of the Seiko Sports 100 in the 1980s

The Sports 100 series became synonymous with durability, technical complexity, and stylish execution during the 1980s. Models like the 7A48-7000 brought sophisticated complications into an accessible yet premium package. Today, this watch remains a desirable piece for collectors seeking a blend of sportiness, refinement, and mechanical heritage.

Seiko Sports 100 — 12-Month Warranty, Worldwide Shipping

This Seiko Sports 100 7A48-7000 is fully serviced, in complete working order, and retains all original components. It is offered with a 12-month warranty. We ship worldwide with professional, secure packaging. Explore our curated selection of Seiko vintage watches with moonphase complication from the 1980s or discover our collection of vintage quartz chronographs with unique complications.