Seiko Cal. 6138 - 158

The Seiko 6138-158 represents an important milestone in Seiko's 1965 lineup. Powered by the 6138 caliber with 29j jewels beating at 36,000 bph, it delivers a 67 hours power reserve. [seikata-wm-b220d98075e9]

Also known as: Monster, Sumo

Specifications

Movement

Quartz

Case Material

PVD Black

Case Width

37mm

Case Thickness

11.8mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Coin-Edge

Water Resistance

60m

Dial Color

Green

Jewels

29j

Frequency

36,000 bph

Power Reserve

67 hours

Year

1965

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