Seiko Cal. 6131 - 665

This Spring Drive model from 1984 features a 40mm PVD Black case. With its 19mm lug width and 8.0mm profile, it sits comfortably on most wrists. [seikata-wm-9ae7d1085432]

Also known as: Baby Tuna

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

40mm

Case Thickness

8.0mm

Lug Width

19mm

Crystal

Acrylic

Bezel

Bidirectional

Water Resistance

100m

Dial Color

Navy

Jewels

30j

Frequency

28,800 bph

Power Reserve

37 hours

Year

1984

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