Seiko Cal. 6638 - 590

The Seiko 6638-590 represents an important milestone in Seiko's 1969 lineup. It features a Champagne dial protected by a Mineral crystal and offers 40m of water resistance. [seikata-wm-6dce9cfcf710]

Specifications

Movement

Hand-Winding

Case Material

PVD Black

Case Width

39mm

Case Thickness

12.4mm

Lug Width

19mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

40m

Dial Color

Champagne

Jewels

31j

Frequency

28,800 bph

Power Reserve

47 hours

Year

1969

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