Seiko Cal. 3861 - 639

The Seiko 3861-639 represents an important milestone in Seiko's 1971 lineup. It features a Silver dial protected by a Hardlex crystal and offers 30m of water resistance. [seikata-wm-eb925a1bfad3]

Also known as: Turtle

Specifications

Movement

Hand-Winding

Case Material

Hardlex-Coated Steel

Case Width

39mm

Case Thickness

9.2mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

30m

Dial Color

Silver

Jewels

32j

Frequency

28,800 bph

Power Reserve

43 hours

Year

1971

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