Seiko Cal. 3851 - 164

The Seiko 3851-164 represents an important milestone in Seiko's 1970 lineup. Powered by the 3851 caliber with 31j jewels beating at 36,000 bph, it delivers a 72 hours power reserve. [seikata-wm-78cc8350e5d8]

Also known as: Bullhead, Baby Tuna

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

38mm

Case Thickness

11.6mm

Lug Width

18mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

170m

Dial Color

Blue Sunburst

Jewels

31j

Frequency

36,000 bph

Power Reserve

72 hours

Year

1970

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