Seiko Cal. 5644 - 878

This Hand-Winding model from 1977 features a 41mm Two-Tone case. With its 21mm lug width and 11.7mm profile, it sits comfortably on most wrists. [seikata-wm-73780cec6444]

Also known as: Rally, Sportsmatic

Specifications

Movement

Hand-Winding

Case Material

Two-Tone

Case Width

41mm

Case Thickness

11.7mm

Lug Width

21mm

Crystal

Mineral

Bezel

Bidirectional

Water Resistance

120m

Dial Color

Blue Sunburst

Jewels

26j

Frequency

36,000 bph

Power Reserve

63 hours

Year

1977

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