Seiko Cal. 5646 - 639

The Seiko 5646-639 represents an important milestone in Seiko's 1982 lineup. With its 19mm lug width and 15.5mm profile, it sits comfortably on most wrists. [seikata-wm-a7be6d8832ca]

Also known as: Rally, World Timer

Specifications

Movement

Solar

Case Material

Titanium

Case Width

40mm

Case Thickness

15.5mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

190m

Dial Color

Silver

Jewels

31j

Frequency

28,800 bph

Power Reserve

44 hours

Year

1982

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