Seiko Cal. 3899 - 640

Seiko 3899-640

This Spring Drive model from 1998 features a 37mm Stainless Steel case. The Inner Rotating bezel and 37mm case give it a distinctive presence on the wrist. [seikata-wm-ee2d48fdc493]

Also known as: Monster

Specifications

Movement
Spring Drive
Case Material
Stainless Steel
Case Width
37mm
Case Thickness
8.3mm
Lug Width
20mm
Crystal
Hardlex
Bezel
Inner Rotating
Water Resistance
60m
Dial Color
Silver
Jewels
18j
Frequency
36,000 bph
Power Reserve
71 hours
Year
1998

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seikata-wm-ee2d48fdc493