Seiko Cal. 3879 - 612

The Seiko 3879-612 represents an important milestone in Seiko's 1970 lineup. Powered by the 3879 caliber with 21j jewels beating at 36,000 bph, it delivers a 50 hours power reserve. [seikata-wm-474999c3bdd1]

Also known as: Bullhead, Sportsmatic

Specifications

Movement

Hand-Winding

Case Material

Hardlex-Coated Steel

Case Width

44mm

Case Thickness

10.9mm

Lug Width

21mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

190m

Dial Color

White

Jewels

21j

Frequency

36,000 bph

Power Reserve

50 hours

Year

1970

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