Seiko Cal. 5644 - 524

This Spring Drive model from 1981 features a 45mm Two-Tone case. With its 19mm lug width and 15.8mm profile, it sits comfortably on most wrists. [seikata-wm-be8b7a444833]

Also known as: Tuna, Bellmatic

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

45mm

Case Thickness

15.8mm

Lug Width

19mm

Crystal

Mineral

Bezel

Rotating

Water Resistance

60m

Dial Color

Green

Jewels

26j

Frequency

36,000 bph

Power Reserve

39 hours

Year

1981

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