Seiko Cal. 4437 - 691

The 4437-691 is a sought-after Automatic piece from Seiko's golden era. Powered by the 4437 caliber with 34j jewels beating at 28,800 bph, it delivers a 45 hours power reserve. [seikata-wm-e21a294cd61b]

Also known as: World Timer

Specifications

Movement

Automatic

Case Material

Titanium

Case Width

38mm

Case Thickness

11.7mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Rotating

Water Resistance

100m

Dial Color

Blue Sunburst

Jewels

34j

Frequency

28,800 bph

Power Reserve

45 hours

Year

1998

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