Seiko Cal. 6331 - 238

The Seiko 6331-238 represents an important milestone in Seiko's 1968 lineup. It features a Navy dial protected by a Mineral crystal and offers 100m of water resistance. [seikata-wm-947798a0adb4]

Also known as: UFO, Navigator

Specifications

Movement

Quartz

Case Material

Two-Tone

Case Width

45mm

Case Thickness

14.9mm

Lug Width

20mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

100m

Dial Color

Navy

Jewels

25j

Frequency

36,000 bph

Power Reserve

57 hours

Year

1968

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