Seiko Cal. 6640 - 233

Seiko 6640-233

This Spring Drive model from 1991 features a 36mm Stainless Steel case. The Inner Rotating bezel and 36mm case give it a distinctive presence on the wrist. [seikata-wm-b07d08e775fb]

Specifications

Movement
Spring Drive
Case Material
Stainless Steel
Case Width
36mm
Case Thickness
15.8mm
Lug Width
21mm
Crystal
Mineral
Bezel
Inner Rotating
Water Resistance
150m
Dial Color
Green
Jewels
24j
Frequency
28,800 bph
Power Reserve
60 hours
Year
1991

Related Models

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