Seiko Cal. 5638 - 784

The Seiko 5638-784 represents an important milestone in Seiko's 1986 lineup. With its 22mm lug width and 9.4mm profile, it sits comfortably on most wrists. [seikata-wm-5541bcdadf27]

Also known as: Tuna, Pogue

Specifications

Movement

Hand-Winding

Case Material

Two-Tone

Case Width

41mm

Case Thickness

9.4mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

180m

Dial Color

White

Jewels

21j

Frequency

21,600 bph

Power Reserve

47 hours

Year

1986

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