Seiko Cal. 6639 - 456

The Seiko 6639-456 represents an important milestone in Seiko's 1985 lineup. It features a White dial protected by a Mineral crystal and offers 150m of water resistance. [seikata-wm-d4255e917c14]

Also known as: Bullhead, Navigator

Specifications

Movement

Kinetic

Case Material

Titanium

Case Width

34mm

Case Thickness

15.6mm

Lug Width

21mm

Crystal

Mineral

Bezel

Coin-Edge

Water Resistance

150m

Dial Color

White

Jewels

24j

Frequency

36,000 bph

Power Reserve

40 hours

Year

1985

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