Seiko Cal. 6638 - 819

Seiko 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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