Seiko Cal. 6634 - 678

The Seiko 6634-678 represents an important milestone in Seiko's 1979 lineup. Powered by the 6634 caliber with 36j jewels beating at 28,800 bph, it delivers a 64 hours power reserve. [seikata-wm-c10c7a54bd9d]

Also known as: Samurai, Monster

Specifications

Movement

Automatic

Case Material

Stainless Steel

Case Width

39mm

Case Thickness

11.2mm

Lug Width

19mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

170m

Dial Color

Burgundy

Jewels

36j

Frequency

28,800 bph

Power Reserve

64 hours

Year

1979

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