Seiko Cal. 4437 - 321

The Seiko 4437-321 represents an important milestone in Seiko's 1983 lineup. Powered by the 4437 caliber with 21j jewels beating at 28,800 bph, it delivers a 64 hours power reserve. [seikata-wm-0977e61582a5]

Also known as: Turtle, Monster

Specifications

Movement

Hand-Winding

Case Material

Titanium

Case Width

46mm

Case Thickness

8.3mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

120m

Dial Color

Green

Jewels

21j

Frequency

28,800 bph

Power Reserve

64 hours

Year

1983

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