Seiko Cal. 6634 - 397

The Seiko 6634-397 represents an important milestone in Seiko's 1966 lineup. Powered by the 6634 caliber with 21j jewels beating at 28,800 bph, it delivers a 62 hours power reserve. [seikata-wm-1707c0bdde59]

Also known as: Monster

Specifications

Movement

Kinetic

Case Material

Hardlex-Coated Steel

Case Width

42mm

Case Thickness

9.6mm

Lug Width

22mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

60m

Dial Color

Champagne

Jewels

21j

Frequency

28,800 bph

Power Reserve

62 hours

Year

1966

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