Seiko Cal. 6391 - 639

This Spring Drive model from 1992 features a 41mm Titanium case. It features a White dial protected by a Sapphire crystal and offers 140m of water resistance. [seikata-wm-9b324999e116]

Also known as: UFO, Rally

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

41mm

Case Thickness

11.2mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

140m

Dial Color

White

Jewels

24j

Frequency

36,000 bph

Power Reserve

42 hours

Year

1992

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