Seiko Cal. 4437 - 643

The Seiko 4437-643 represents an important milestone in Seiko's 1999 lineup. With its 22mm lug width and 8.2mm profile, it sits comfortably on most wrists. [seikata-wm-578f37e5d96b]

Also known as: Baby Tuna

Specifications

Movement

Hand-Winding

Case Material

Gold-Plated

Case Width

38mm

Case Thickness

8.2mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

40m

Dial Color

Cream

Jewels

33j

Frequency

28,800 bph

Power Reserve

48 hours

Year

1999

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