Seiko Cal. 5637 - 403

The Seiko 5637-403 represents an important milestone in Seiko's 1971 lineup. It features a White dial protected by a Sapphire crystal and offers 130m of water resistance. [seikata-wm-a14b2012eb17]

Also known as: Turtle, Samurai

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

41mm

Case Thickness

9.7mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

130m

Dial Color

White

Jewels

33j

Frequency

36,000 bph

Power Reserve

54 hours

Year

1971

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