Seiko Cal. 4437 - 964

The Seiko 4437-964 represents an important milestone in Seiko's 1975 lineup. With its 21mm lug width and 14.9mm profile, it sits comfortably on most wrists. [seikata-wm-a209db0cf339]

Also known as: Bullhead, Sportsmatic

Specifications

Movement

Kinetic

Case Material

Two-Tone

Case Width

39mm

Case Thickness

14.9mm

Lug Width

21mm

Crystal

Mineral

Bezel

Bidirectional

Water Resistance

180m

Dial Color

Cream

Jewels

32j

Frequency

36,000 bph

Power Reserve

63 hours

Year

1975

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