Seiko Cal. 6138 - 307

The Seiko 6138-307 represents an important milestone in Seiko's 1969 lineup. The Bidirectional bezel and 41mm case give it a distinctive presence on the wrist. [seikata-wm-d82cc291e21d]

Also known as: Crown, Baby Tuna

Specifications

Movement

Quartz

Case Material

Titanium

Case Width

41mm

Case Thickness

9.1mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

80m

Dial Color

Green

Jewels

33j

Frequency

21,600 bph

Power Reserve

71 hours

Year

1969

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