Seiko Cal. 6645 - 684

This Spring Drive model from 1991 features a 40mm Two-Tone case. With its 21mm lug width and 8.3mm profile, it sits comfortably on most wrists. [seikata-wm-aa78366f7ffa]

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

40mm

Case Thickness

8.3mm

Lug Width

21mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

90m

Dial Color

Navy

Jewels

35j

Frequency

28,800 bph

Power Reserve

66 hours

Year

1991

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