Seiko Cal. 5640 - 158

Released in 1996, the Cal. 5640 with design code 158 was part of Seiko's domestic market collection. With its 22mm lug width and 9.4mm profile, it sits comfortably on most wrists. [seikata-wm-f1d003fb9ba4]

Also known as: Sumo, Golden Tuna

Specifications

Movement

Automatic

Case Material

PVD Black

Case Width

39mm

Case Thickness

9.4mm

Lug Width

22mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

120m

Dial Color

White

Jewels

32j

Frequency

28,800 bph

Power Reserve

63 hours

Year

1996

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