Seiko Cal. 5615 - 644

The Seiko 5615-644 represents an important milestone in Seiko's 1973 lineup. With its 21mm lug width and 9.5mm profile, it sits comfortably on most wrists. [seikata-wm-86803c6a4aa5]

Also known as: Sportsmatic, Navigator

Specifications

Movement

Spring Drive

Case Material

Gold-Plated

Case Width

40mm

Case Thickness

9.5mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Bidirectional

Water Resistance

190m

Dial Color

Navy

Jewels

17j

Frequency

21,600 bph

Power Reserve

65 hours

Year

1973

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