Seiko Cal. 4437 - 312

The Seiko 4437-312 represents an important milestone in Seiko's 1997 lineup. Powered by the 4437 caliber with 21j jewels beating at 36,000 bph, it delivers a 47 hours power reserve. [seikata-wm-e9c1e07497da]

Also known as: Sportsmatic, World Timer

Specifications

Movement

Automatic

Case Material

Gold-Plated

Case Width

38mm

Case Thickness

14.3mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

90m

Dial Color

Green

Jewels

21j

Frequency

36,000 bph

Power Reserve

47 hours

Year

1997

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