Seiko Cal. 4437 - 616

The Seiko 4437-616 represents an important milestone in Seiko's 1986 lineup. Powered by the 4437 caliber with 33j jewels beating at 21,600 bph, it delivers a 39 hours power reserve. [seikata-wm-c53f4f8e1584]

Also known as: Tuna, Silverwave

Specifications

Movement

Kinetic

Case Material

PVD Black

Case Width

37mm

Case Thickness

11.1mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Rotating

Water Resistance

80m

Dial Color

Burgundy

Jewels

33j

Frequency

21,600 bph

Power Reserve

39 hours

Year

1986

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