Seiko Cal. 6638 - 306

The Seiko 6638-306 represents an important milestone in Seiko's 1990 lineup. It features a Black dial protected by a Mineral crystal and offers 190m of water resistance. [seikata-wm-615310048583]

Also known as: Golden Tuna

Specifications

Movement

Hand-Winding

Case Material

Hardlex-Coated Steel

Case Width

43mm

Case Thickness

14.1mm

Lug Width

21mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

190m

Dial Color

Black

Jewels

18j

Frequency

21,600 bph

Power Reserve

39 hours

Year

1990

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