Seiko Cal. 5690 - 437

The Seiko 5690-437 represents an important milestone in Seiko's 1985 lineup. The Bidirectional bezel and 45mm case give it a distinctive presence on the wrist. [seikata-wm-a89bf6cc1b91]

Also known as: Helmet

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

45mm

Case Thickness

15.9mm

Lug Width

18mm

Crystal

Mineral

Bezel

Bidirectional

Water Resistance

50m

Dial Color

Champagne

Jewels

18j

Frequency

28,800 bph

Power Reserve

43 hours

Year

1985

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