Seiko Cal. 6390 - 337

The Seiko 6390-337 represents an important milestone in Seiko's 1977 lineup. It features a White dial protected by a Sapphire crystal and offers 170m of water resistance. [seikata-wm-ae2cfb718d87]

Also known as: Tuna

Specifications

Movement

Quartz

Case Material

Hardlex-Coated Steel

Case Width

38mm

Case Thickness

10.6mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

170m

Dial Color

White

Jewels

28j

Frequency

28,800 bph

Power Reserve

66 hours

Year

1977

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