Seiko Cal. 6637 - 988

Seiko 6637-988

This Hand-Winding model from 1977 features a 41mm Titanium case. The Fixed bezel and 41mm case give it a distinctive presence on the wrist. [seikata-wm-8e64ef64d840]

Also known as: Monster

Specifications

Movement
Hand-Winding
Case Material
Titanium
Case Width
41mm
Case Thickness
13.5mm
Lug Width
20mm
Crystal
Acrylic
Bezel
Fixed
Water Resistance
140m
Dial Color
Black
Jewels
19j
Frequency
21,600 bph
Power Reserve
41 hours
Year
1977

Related Models

seikata-wm-8e64ef64d840