Seiko Cal. 6639 - 699

The Seiko 6639-699 represents an important milestone in Seiko's 1978 lineup. It features a Black dial protected by a Mineral crystal and offers 160m of water resistance. [seikata-wm-77c16be24a10]

Also known as: Helmet, Goldfeather

Specifications

Movement

Kinetic

Case Material

Hardlex-Coated Steel

Case Width

43mm

Case Thickness

15.7mm

Lug Width

18mm

Crystal

Mineral

Bezel

Rotating

Water Resistance

160m

Dial Color

Black

Jewels

20j

Frequency

28,800 bph

Power Reserve

45 hours

Year

1978

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