Seiko Cal. 5646 - 644

This Solar model from 1970 features a 40mm Titanium case. With its 22mm lug width and 10.0mm profile, it sits comfortably on most wrists. [seikata-wm-d131830f1cd2]

Also known as: Helmet, Flighty

Specifications

Movement

Solar

Case Material

Titanium

Case Width

40mm

Case Thickness

10.0mm

Lug Width

22mm

Crystal

Hardlex

Bezel

Rotating

Water Resistance

140m

Dial Color

Blue Sunburst

Jewels

23j

Frequency

21,600 bph

Power Reserve

52 hours

Year

1970

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