Seiko Cal. 6138 - 740

Released in 1978, the Cal. 6138 with design code 740 was part of Seiko's domestic market collection. The Inner Rotating bezel and 34mm case give it a distinctive presence on the wrist. [seikata-wm-e477eea34bc2]

Also known as: Helmet, Emperor

Specifications

Movement

Kinetic

Case Material

Titanium

Case Width

34mm

Case Thickness

12.2mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

100m

Dial Color

White

Jewels

28j

Frequency

36,000 bph

Power Reserve

62 hours

Year

1978

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