Seiko Cal. 6639 - 237

The Seiko 6639-237 represents an important milestone in Seiko's 1993 lineup. It features a Green dial protected by a Acrylic crystal and offers 170m of water resistance. [seikata-wm-cb320e3f60b3]

Also known as: World Timer

Specifications

Movement

Hand-Winding

Case Material

Gold-Plated

Case Width

43mm

Case Thickness

15.7mm

Lug Width

19mm

Crystal

Acrylic

Bezel

Rotating

Water Resistance

170m

Dial Color

Green

Jewels

29j

Frequency

21,600 bph

Power Reserve

50 hours

Year

1993

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