Seiko Cal. 5646 - 739

The Seiko 5646-739 represents an important milestone in Seiko's 1971 lineup. With its 21mm lug width and 15.0mm profile, it sits comfortably on most wrists. [seikata-wm-2ef7b925b7a8]

Also known as: Crown, Flighty

Specifications

Movement

Solar

Case Material

Gold-Plated

Case Width

39mm

Case Thickness

15.0mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Coin-Edge

Water Resistance

130m

Dial Color

Cream

Jewels

32j

Frequency

36,000 bph

Power Reserve

48 hours

Year

1971

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