Seiko Cal. 6640 - 709

This Hand-Winding model from 1985 features a 44mm Titanium case. It features a Champagne dial protected by a Acrylic crystal and offers 100m of water resistance. [seikata-wm-c0419e45eba1]

Also known as: Helmet, Rally

Specifications

Movement

Hand-Winding

Case Material

Titanium

Case Width

44mm

Case Thickness

10.5mm

Lug Width

20mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

100m

Dial Color

Champagne

Jewels

22j

Frequency

36,000 bph

Power Reserve

71 hours

Year

1985

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