Seiko Cal. 5631 - 706

Released in 1971, the Cal. 5631 with design code 706 was part of Seiko's domestic market collection. With its 22mm lug width and 13.0mm profile, it sits comfortably on most wrists. [seikata-wm-5d958ab5bf12]

Also known as: Navigator, Emperor

Specifications

Movement

Solar

Case Material

Two-Tone

Case Width

45mm

Case Thickness

13.0mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

30m

Dial Color

Black

Jewels

33j

Frequency

36,000 bph

Power Reserve

71 hours

Year

1971

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