Seiko Cal. 6639 - 257

The Seiko 6639-257 represents an important milestone in Seiko's 1965 lineup. It features a White dial protected by a Hardlex crystal and offers 160m of water resistance. [seikata-wm-c9fc649bdb62]

Also known as: Monster, Crown

Specifications

Movement

Kinetic

Case Material

PVD Black

Case Width

45mm

Case Thickness

14.6mm

Lug Width

22mm

Crystal

Hardlex

Bezel

Rotating

Water Resistance

160m

Dial Color

White

Jewels

32j

Frequency

28,800 bph

Power Reserve

39 hours

Year

1965

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