Seiko Cal. 6640 - 421

This Hand-Winding model from 1997 features a 41mm Titanium case. It features a Blue Sunburst dial protected by a Hardlex crystal and offers 110m of water resistance. [seikata-wm-9ca7d58c476d]

Also known as: UFO

Specifications

Movement

Hand-Winding

Case Material

Titanium

Case Width

41mm

Case Thickness

10.6mm

Lug Width

22mm

Crystal

Hardlex

Bezel

Rotating

Water Resistance

110m

Dial Color

Blue Sunburst

Jewels

24j

Frequency

21,600 bph

Power Reserve

59 hours

Year

1997

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