Seiko Cal. 6131 - 138

The 6131-138 is a sought-after Automatic piece from Seiko's golden era. The Inner Rotating bezel and 36mm case give it a distinctive presence on the wrist. [seikata-wm-3354fded16fa]

Also known as: Samurai

Specifications

Movement

Automatic

Case Material

Titanium

Case Width

36mm

Case Thickness

15.2mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

30m

Dial Color

Black

Jewels

28j

Frequency

28,800 bph

Power Reserve

66 hours

Year

1975

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