Seiko Cal. 3897 - 813

The Seiko 3897-813 represents an important milestone in Seiko's 1966 lineup. Powered by the 3897 caliber with 36j jewels beating at 36,000 bph, it delivers a 52 hours power reserve. [seikata-wm-8f84dedfa41c]

Also known as: Monster, Sumo

Specifications

Movement

Hand-Winding

Case Material

Titanium

Case Width

39mm

Case Thickness

11.1mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

50m

Dial Color

Burgundy

Jewels

36j

Frequency

36,000 bph

Power Reserve

52 hours

Year

1966

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