Seiko Cal. 6644 - 701

This Automatic model from 1978 features a 39mm Titanium case. It features a Black dial protected by a Hardlex crystal and offers 200m of water resistance. [seikata-wm-f7890e93ed55]

Also known as: Helmet, Bellmatic

Specifications

Movement

Automatic

Case Material

Titanium

Case Width

39mm

Case Thickness

8.3mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Coin-Edge

Water Resistance

200m

Dial Color

Black

Jewels

25j

Frequency

28,800 bph

Power Reserve

66 hours

Year

1978

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