Seiko Cal. 3856 - 370

The Seiko 3856-370 represents an important milestone in Seiko's 1989 lineup. Powered by the 3856 caliber with 31j jewels beating at 36,000 bph, it delivers a 66 hours power reserve. [seikata-wm-36ad60245a17]

Also known as: Sumo, Tuna

Specifications

Movement

Hand-Winding

Case Material

Two-Tone

Case Width

40mm

Case Thickness

13.9mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

100m

Dial Color

Champagne

Jewels

31j

Frequency

36,000 bph

Power Reserve

66 hours

Year

1989

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