Seiko Cal. 6638 - 145

The Seiko 6638-145 represents an important milestone in Seiko's 1970 lineup. It features a Navy dial protected by a Mineral crystal and offers 110m of water resistance. [seikata-wm-8b9d8e0c8132]

Specifications

Movement

Hand-Winding

Case Material

Two-Tone

Case Width

39mm

Case Thickness

14.0mm

Lug Width

22mm

Crystal

Mineral

Bezel

Bidirectional

Water Resistance

110m

Dial Color

Navy

Jewels

28j

Frequency

21,600 bph

Power Reserve

53 hours

Year

1970

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