Seiko Cal. 6640 - 707

This Kinetic model from 1975 features a 37mm PVD Black case. With its 19mm lug width and 10.1mm profile, it sits comfortably on most wrists. [seikata-wm-005c2697321b]

Also known as: Bullhead, Sportsmatic

Specifications

Movement

Kinetic

Case Material

PVD Black

Case Width

37mm

Case Thickness

10.1mm

Lug Width

19mm

Crystal

Mineral

Bezel

Coin-Edge

Water Resistance

150m

Dial Color

Black

Jewels

36j

Frequency

36,000 bph

Power Reserve

36 hours

Year

1975

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