Seiko Cal. 3871 - 643

Seiko 3871-643

The 3871-643 is a sought-after Kinetic piece from Seiko's golden era. The Bidirectional bezel and 39mm case give it a distinctive presence on the wrist. [seikata-wm-ebd3960e093a]

Also known as: Helmet

Specifications

Movement
Kinetic
Case Material
Stainless Steel
Case Width
39mm
Case Thickness
12.1mm
Lug Width
20mm
Crystal
Hardlex
Bezel
Bidirectional
Water Resistance
180m
Dial Color
Blue Sunburst
Jewels
28j
Frequency
36,000 bph
Power Reserve
63 hours
Year
1989

Related Models

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