Seiko Cal. 3898 - 637

Seiko 3898-637

The 3898-637 is a sought-after Hand-Winding piece from Seiko's golden era. The Inner Rotating bezel and 45mm case give it a distinctive presence on the wrist. [seikata-wm-fb4fe2a7e040]

Also known as: Bullhead

Specifications

Movement
Hand-Winding
Case Material
PVD Black
Case Width
45mm
Case Thickness
12.0mm
Lug Width
20mm
Crystal
Hardlex
Bezel
Inner Rotating
Water Resistance
70m
Dial Color
Cream
Jewels
25j
Frequency
28,800 bph
Power Reserve
65 hours
Year
1982

Related Models

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