Seiko Cal. 4437 - 812

The Seiko 4437-812 represents an important milestone in Seiko's 1985 lineup. With its 20mm lug width and 9.4mm profile, it sits comfortably on most wrists. [seikata-wm-e503997ef1f4]

Also known as: Tuna, Silverwave

Specifications

Movement

Automatic

Case Material

Titanium

Case Width

36mm

Case Thickness

9.4mm

Lug Width

20mm

Crystal

Acrylic

Bezel

Bidirectional

Water Resistance

160m

Dial Color

Burgundy

Jewels

24j

Frequency

28,800 bph

Power Reserve

50 hours

Year

1985

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