Seiko Cal. 6631 - 134

The Seiko 6631-134 represents an important milestone in Seiko's 1972 lineup. With its 19mm lug width and 8.7mm profile, it sits comfortably on most wrists. [seikata-wm-7d3da7e7ff81]

Also known as: Tuna, Bullhead

Specifications

Movement

Solar

Case Material

Titanium

Case Width

44mm

Case Thickness

8.7mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

150m

Dial Color

Navy

Jewels

24j

Frequency

28,800 bph

Power Reserve

63 hours

Year

1972

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