Seiko Cal. 3860 - 438

The Seiko 3860-438 represents an important milestone in Seiko's 1979 lineup. Powered by the 3860 caliber with 32j jewels beating at 36,000 bph, it delivers a 39 hours power reserve. [seikata-wm-f9d140598bd8]

Also known as: Sumo

Specifications

Movement

Automatic

Case Material

Two-Tone

Case Width

34mm

Case Thickness

9.2mm

Lug Width

22mm

Crystal

Hardlex

Bezel

Coin-Edge

Water Resistance

140m

Dial Color

Champagne

Jewels

32j

Frequency

36,000 bph

Power Reserve

39 hours

Year

1979

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