Seiko Cal. 6639 - 602

The Seiko 6639-602 represents an important milestone in Seiko's 1978 lineup. It features a Black dial protected by a Sapphire crystal and offers 140m of water resistance. [seikata-wm-d8277aaf61c6]

Also known as: UFO, Emperor

Specifications

Movement

Quartz

Case Material

Gold-Plated

Case Width

44mm

Case Thickness

8.2mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

140m

Dial Color

Black

Jewels

24j

Frequency

36,000 bph

Power Reserve

62 hours

Year

1978

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