Seiko Cal. 6640 - 603

This Spring Drive model from 1969 features a 41mm Titanium case. It features a Burgundy dial protected by a Sapphire crystal and offers 200m of water resistance. [seikata-wm-dc8ef7a4897b]

Also known as: Bullhead, World Timer

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

41mm

Case Thickness

8.6mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

200m

Dial Color

Burgundy

Jewels

30j

Frequency

36,000 bph

Power Reserve

37 hours

Year

1969

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