Seiko Cal. 4439 - 371

The Seiko 4439-371 represents an important milestone in Seiko's 1975 lineup. Powered by the 4439 caliber with 36j jewels beating at 28,800 bph, it delivers a 37 hours power reserve. [seikata-wm-97fe36db94d9]

Also known as: Navigator

Specifications

Movement

Kinetic

Case Material

Hardlex-Coated Steel

Case Width

41mm

Case Thickness

15.7mm

Lug Width

21mm

Crystal

Acrylic

Bezel

Bidirectional

Water Resistance

120m

Dial Color

Champagne

Jewels

36j

Frequency

28,800 bph

Power Reserve

37 hours

Year

1975

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