Seiko Quartz Type II – Ref. 0903-8140 (December 1976, Japan)

This elegant Seiko Quartz Type II with reference 0903-8140 dates from December 1976 and is exemplary of the second generation of Seiko quartz watches – a time when precision, design and technical innovation merged at the highest level.

The case measures approximately 36.5 × 42 mm , has a height of 13.8 mm , and displays the distinctive, angular design language of the 1970s. A particularly noteworthy feature is the original nine-faceted crystal , which spectacularly refracts the light and visually enhances the case's architecture. The original Seiko steel bracelet perfectly complements the design. The total weight is 81 g .

A new battery was installed in November 2025 , so the clock is fully functional.

Technical data

• Reference: 0903-8140
• Serial number: 6Dxxxx (December 1976)
• Movement: Seiko quartz caliber 0903
• Display: Hours, minutes, seconds, day/date (Kanji/English)
• Housing: Stainless steel, screwed-on base
• Dimensions: approx. 36.5 × 42 mm
• Lug-to-lug: 42 mm
• Height: 13.8 mm
• Lug width: 18 mm
• Weight: 81 g (with original strap)
• Glass: Original, nine-faceted
• Battery replacement: November 2025

Design and background

The Type II series was introduced in 1976 as a stylistic and technical evolution of the first Seiko quartz generation. It was part of an effort to refine quartz technology for everyday use – with greater accuracy, slimmer cases, and a clean, modern design.

The model 0903-8140 is characterized by its angular lines, the iridescent blue-silver dial with vertical sunburst finish and the faceted glass – a design element that is otherwise only found in higher priced models.

Historical context

The Seiko Type II was created as a direct successor to the legendary Quartz Astron (1969) and the early Quartz VFA (Very Fine Adjusted) models. While the luxury lines were developed at Suwa Seikosha , the Type II series was predominantly a product of the Daini movement , which was known for its technical experimentation.

During this period, a productive rivalry existed between the two Seiko factories – Suwa (responsible for Grand Seiko and Quartz VFA ) and Daini (responsible for King Seiko and Type II ). This internal competition significantly advanced the technical perfection of Japanese watchmaking.

The Type II thus closed the gap between the early, expensive quartz models and the later mass-market series. It is now considered a significant milestone on the path to the democratization of precise quartz technology.

Condition

Good, original condition with signs of wear on the case and crystal. The rare, original blue-silver gradient dial is in excellent condition. Original Seiko steel bracelet with typical 1970s clasp and Seiko logo.

Warranty (used)
This is a used item. The limitation period for claims based on defects (statutory warranty) is 12 months from delivery.

Notice
As this is a pre-owned watch, water resistance cannot be guaranteed. To protect the movement, the watch should not come into contact with water or moisture.