Seiko Cal. 3879 - 236

The Seiko 3879-236 represents an important milestone in Seiko's 1977 lineup. Powered by the 3879 caliber with 32j jewels beating at 28,800 bph, it delivers a 40 hours power reserve. [seikata-wm-be6350825ff0]

Also known as: Sumo, Helmet

Specifications

Movement

Hand-Winding

Case Material

PVD Black

Case Width

37mm

Case Thickness

8.1mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Bidirectional

Water Resistance

30m

Dial Color

Champagne

Jewels

32j

Frequency

28,800 bph

Power Reserve

40 hours

Year

1977

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