Seiko Cal. 4437 - 233

The Seiko 4437-233 represents an important milestone in Seiko's 1985 lineup. It features a Green dial protected by a Mineral crystal and offers 200m of water resistance. [seikata-wm-c69c0a49ad0d]

Also known as: Sumo, Rally

Specifications

Movement

Automatic

Case Material

PVD Black

Case Width

36mm

Case Thickness

12.0mm

Lug Width

21mm

Crystal

Mineral

Bezel

Bidirectional

Water Resistance

200m

Dial Color

Green

Jewels

25j

Frequency

28,800 bph

Power Reserve

61 hours

Year

1985

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