Seiko Cal. 5637 - 138

The Seiko 5637-138 represents an important milestone in Seiko's 1992 lineup. It features a Black dial protected by a Sapphire crystal and offers 120m of water resistance. [seikata-wm-feaf31002ca8]

Also known as: Helmet

Specifications

Movement

Hand-Winding

Case Material

Hardlex-Coated Steel

Case Width

39mm

Case Thickness

11.0mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

120m

Dial Color

Black

Jewels

36j

Frequency

36,000 bph

Power Reserve

61 hours

Year

1992

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