Seiko Cal. 5657 - 540

This Spring Drive model from 1987 features a 37mm Titanium case. The Coin-Edge bezel and 37mm case give it a distinctive presence on the wrist. [seikata-wm-1bf540714257]

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

37mm

Case Thickness

10.4mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

160m

Dial Color

White

Jewels

17j

Frequency

28,800 bph

Power Reserve

59 hours

Year

1987

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