Seiko Cal. 4438 - 637

The 4438-637 is a sought-after Solar piece from Seiko's golden era. With its 22mm lug width and 14.8mm profile, it sits comfortably on most wrists. [seikata-wm-f4913c76dd2f]

Also known as: Emperor

Specifications

Movement

Solar

Case Material

PVD Black

Case Width

43mm

Case Thickness

14.8mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

100m

Dial Color

Blue Sunburst

Jewels

32j

Frequency

21,600 bph

Power Reserve

45 hours

Year

1973

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