Seiko Cal. 6638 - 819

The 6638-819 is a sought-after Quartz piece from Seiko's golden era. It features a Green dial protected by a Hardlex crystal and offers 100m of water resistance. [seikata-wm-5cee4265b8c7]

Also known as: Sportsmatic, Golden Tuna

Specifications

Movement

Quartz

Case Material

Two-Tone

Case Width

43mm

Case Thickness

8.5mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

100m

Dial Color

Green

Jewels

21j

Frequency

36,000 bph

Power Reserve

36 hours

Year

1984

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