Seiko Cal. 4438 - 129

The Seiko 4438-129 represents an important milestone in Seiko's 1971 lineup. Powered by the 4438 caliber with 21j jewels beating at 28,800 bph, it delivers a 36 hours power reserve. [seikata-wm-2d509c3e0d7e]

Also known as: Monster

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

41mm

Case Thickness

12.8mm

Lug Width

21mm

Crystal

Acrylic

Bezel

Coin-Edge

Water Resistance

100m

Dial Color

Cream

Jewels

21j

Frequency

28,800 bph

Power Reserve

36 hours

Year

1971

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