Seiko Cal. 6638 - 191

Seiko 6638-191

The 6638-191 is a sought-after Quartz piece from Seiko's golden era. It features a Silver dial protected by a Hardlex crystal and offers 180m of water resistance. [seikata-wm-0d3b79da16ee]

Also known as: Monster, UFO

Specifications

Movement
Quartz
Case Material
Stainless Steel
Case Width
36mm
Case Thickness
15.5mm
Lug Width
20mm
Crystal
Hardlex
Bezel
Inner Rotating
Water Resistance
180m
Dial Color
Silver
Jewels
36j
Frequency
21,600 bph
Power Reserve
53 hours
Year
1981

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