Seiko Cal. 5689 - 550

This Hand-Winding model from 1967 features a 39mm Titanium case. It features a Black dial protected by a Acrylic crystal and offers 100m of water resistance. [seikata-wm-c78964f49f9d]

Also known as: Sumo, World Timer

Specifications

Movement

Hand-Winding

Case Material

Titanium

Case Width

39mm

Case Thickness

11.2mm

Lug Width

22mm

Crystal

Acrylic

Bezel

Coin-Edge

Water Resistance

100m

Dial Color

Black

Jewels

30j

Frequency

28,800 bph

Power Reserve

58 hours

Year

1967

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