Seiko Cal. 6631 - 598

This Kinetic model from 1973 features a 36mm Stainless Steel case. With its 18mm lug width and 9.8mm profile, it sits comfortably on most wrists. [seikata-wm-ec21f07e6fc8]

Also known as: Bullhead, Golden Tuna

Specifications

Movement

Kinetic

Case Material

Stainless Steel

Case Width

36mm

Case Thickness

9.8mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

60m

Dial Color

Burgundy

Jewels

32j

Frequency

36,000 bph

Power Reserve

60 hours

Year

1973

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