Seiko Cal. 6639 - 401

This Hand-Winding model from 1980 features a 46mm Titanium case. It features a Burgundy dial protected by a Mineral crystal and offers 140m of water resistance. [seikata-wm-76da0e49f785]

Also known as: Bullhead, World Timer

Specifications

Movement

Hand-Winding

Case Material

Titanium

Case Width

46mm

Case Thickness

14.8mm

Lug Width

18mm

Crystal

Mineral

Bezel

Rotating

Water Resistance

140m

Dial Color

Burgundy

Jewels

32j

Frequency

21,600 bph

Power Reserve

58 hours

Year

1980

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