Seiko Cal. 6138 - 656

The Seiko 6138-656 represents an important milestone in Seiko's 1972 lineup. It features a Black dial protected by a Acrylic crystal and offers 130m of water resistance. [seikata-wm-71953d56c380]

Also known as: Helmet

Specifications

Movement

Hand-Winding

Case Material

Gold-Plated

Case Width

42mm

Case Thickness

10.7mm

Lug Width

19mm

Crystal

Acrylic

Bezel

Bidirectional

Water Resistance

130m

Dial Color

Black

Jewels

21j

Frequency

21,600 bph

Power Reserve

49 hours

Year

1972

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