Seiko Cal. 6639 - 444

The Seiko 6639-444 represents an important milestone in Seiko's 1965 lineup. It features a Silver dial protected by a Hardlex crystal and offers 60m of water resistance. [seikata-wm-7f6bbf9e4d6e]

Also known as: Crown

Specifications

Movement

Hand-Winding

Case Material

Stainless Steel

Case Width

35mm

Case Thickness

14.2mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

60m

Dial Color

Silver

Jewels

36j

Frequency

28,800 bph

Power Reserve

59 hours

Year

1965

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