Seiko Cal. 5637 - 313

The 5637-313 is a sought-after Spring Drive piece from Seiko's golden era. With its 21mm lug width and 15.8mm profile, it sits comfortably on most wrists. [seikata-wm-9919048f4f08]

Also known as: Tuna, Rally

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

44mm

Case Thickness

15.8mm

Lug Width

21mm

Crystal

Mineral

Bezel

Rotating

Water Resistance

70m

Dial Color

Green

Jewels

22j

Frequency

21,600 bph

Power Reserve

72 hours

Year

1997

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