Seiko Cal. 4437 - 871

The Seiko 4437-871 represents an important milestone in Seiko's 1975 lineup. Powered by the 4437 caliber with 31j jewels beating at 36,000 bph, it delivers a 45 hours power reserve. [seikata-wm-2b8c7d24ec1c]

Also known as: Tuna, Navigator

Specifications

Movement

Quartz

Case Material

Hardlex-Coated Steel

Case Width

44mm

Case Thickness

13.6mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

160m

Dial Color

Cream

Jewels

31j

Frequency

36,000 bph

Power Reserve

45 hours

Year

1975

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