Seiko Cal. 6640 - 130

This Spring Drive model from 1983 features a 36mm PVD Black case. With its 18mm lug width and 8.5mm profile, it sits comfortably on most wrists. [seikata-wm-607f6e67b450]

Also known as: Baby Tuna

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

36mm

Case Thickness

8.5mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

50m

Dial Color

Cream

Jewels

20j

Frequency

21,600 bph

Power Reserve

46 hours

Year

1983

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