Seiko Cal. 3861 - 647

The Seiko 3861-647 represents an important milestone in Seiko's 1992 lineup. The Inner Rotating bezel and 45mm case give it a distinctive presence on the wrist. [seikata-wm-8ed4abb6533f]

Also known as: Sportsmatic, Flighty

Specifications

Movement

Hand-Winding

Case Material

Hardlex-Coated Steel

Case Width

45mm

Case Thickness

13.4mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

50m

Dial Color

Cream

Jewels

18j

Frequency

36,000 bph

Power Reserve

58 hours

Year

1992

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