Seiko Cal. 3831 - 355

The Seiko 3831-355 represents an important milestone in Seiko's 1967 lineup. Powered by the 3831 caliber with 32j jewels beating at 28,800 bph, it delivers a 46 hours power reserve. [seikata-wm-abf33bf25d32]

Also known as: Sumo

Specifications

Movement

Hand-Winding

Case Material

Titanium

Case Width

43mm

Case Thickness

8.7mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

170m

Dial Color

White

Jewels

32j

Frequency

28,800 bph

Power Reserve

46 hours

Year

1967

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