Seiko Cal. 5634 - 399

The Seiko 5634-399 represents an important milestone in Seiko's 1975 lineup. Powered by the 5634 caliber with 19j jewels beating at 36,000 bph, it delivers a 45 hours power reserve. [seikata-wm-c2e86b9d26ec]

Also known as: Monster, Sumo

Specifications

Movement

Automatic

Case Material

Two-Tone

Case Width

45mm

Case Thickness

10.1mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Rotating

Water Resistance

90m

Dial Color

Burgundy

Jewels

19j

Frequency

36,000 bph

Power Reserve

45 hours

Year

1975

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