Seiko Cal. 6131 - 904

The Seiko 6131-904 represents an important milestone in Seiko's 1985 lineup. With its 19mm lug width and 14.5mm profile, it sits comfortably on most wrists. [seikata-wm-dd3efe3864ff]

Also known as: Bullhead

Specifications

Movement

Hand-Winding

Case Material

PVD Black

Case Width

35mm

Case Thickness

14.5mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

120m

Dial Color

Silver

Jewels

23j

Frequency

28,800 bph

Power Reserve

37 hours

Year

1985

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