Seiko Cal. 3866 - 937

The Seiko 3866-937 represents an important milestone in Seiko's 1971 lineup. The Bidirectional bezel and 42mm case give it a distinctive presence on the wrist. [seikata-wm-22f4a73d7002]

Also known as: Sportsmatic

Specifications

Movement

Kinetic

Case Material

Hardlex-Coated Steel

Case Width

42mm

Case Thickness

9.8mm

Lug Width

20mm

Crystal

Mineral

Bezel

Bidirectional

Water Resistance

90m

Dial Color

White

Jewels

26j

Frequency

36,000 bph

Power Reserve

42 hours

Year

1971

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