Seiko Cal. 5638 - 745

This Solar model from 1981 features a 40mm Two-Tone case. With its 22mm lug width and 8.4mm profile, it sits comfortably on most wrists. [seikata-wm-39e7b2d18c47]

Also known as: Tuna, Bellmatic

Specifications

Movement

Solar

Case Material

Two-Tone

Case Width

40mm

Case Thickness

8.4mm

Lug Width

22mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

30m

Dial Color

Cream

Jewels

29j

Frequency

28,800 bph

Power Reserve

49 hours

Year

1981

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