Seiko Cal. 6331 - 137

Seiko 6331-137

The 6331-137 is a sought-after Quartz piece from Seiko's golden era. With its 19mm lug width and 8.9mm profile, it sits comfortably on most wrists. [seikata-wm-b1cacbc3e037]

Also known as: Monster, Baby Tuna

Specifications

Movement
Quartz
Case Material
PVD Black
Case Width
36mm
Case Thickness
8.9mm
Lug Width
19mm
Crystal
Sapphire
Bezel
Inner Rotating
Water Resistance
60m
Dial Color
Champagne
Jewels
27j
Frequency
36,000 bph
Power Reserve
69 hours
Year
1989

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