Seiko Cal. 6637 - 273

Seiko 6637-273

This Spring Drive model from 1985 features a 36mm PVD Black case. The Coin-Edge bezel and 36mm case give it a distinctive presence on the wrist. [seikata-wm-1c01d8c42a0e]

Also known as: Monster, Sumo

Specifications

Movement
Spring Drive
Case Material
PVD Black
Case Width
36mm
Case Thickness
15.5mm
Lug Width
20mm
Crystal
Mineral
Bezel
Coin-Edge
Water Resistance
180m
Dial Color
Green
Jewels
35j
Frequency
36,000 bph
Power Reserve
64 hours
Year
1985

Related Models

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