Seiko Cal. 6391 - 603

The Seiko 6391-603 represents an important milestone in Seiko's 1987 lineup. It features a Navy dial protected by a Sapphire crystal and offers 140m of water resistance. [seikata-wm-a67ea4dd6e53]

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

35mm

Case Thickness

9.4mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

140m

Dial Color

Navy

Jewels

25j

Frequency

21,600 bph

Power Reserve

44 hours

Year

1987

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