Seiko Cal. 5643 - 397

The Seiko 5643-397 represents an important milestone in Seiko's 1983 lineup. It features a Navy dial protected by a Sapphire crystal and offers 30m of water resistance. [seikata-wm-80e2de9580c5]

Also known as: Tuna

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

39mm

Case Thickness

9.9mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

30m

Dial Color

Navy

Jewels

25j

Frequency

21,600 bph

Power Reserve

58 hours

Year

1983

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