Seiko Cal. 6637 - 504

The Seiko 6637-504 represents an important milestone in Seiko's 1979 lineup. The Coin-Edge bezel and 43mm case give it a distinctive presence on the wrist. [seikata-wm-609c253a0586]

Also known as: Samurai

Specifications

Movement

Automatic

Case Material

PVD Black

Case Width

43mm

Case Thickness

12.0mm

Lug Width

21mm

Crystal

Acrylic

Bezel

Coin-Edge

Water Resistance

50m

Dial Color

Burgundy

Jewels

20j

Frequency

36,000 bph

Power Reserve

46 hours

Year

1979

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