Seiko Cal. 4438 - 557

This Solar model from 1970 features a 46mm Stainless Steel case. With its 20mm lug width and 10.7mm profile, it sits comfortably on most wrists. [seikata-wm-a3a77e652d61]

Also known as: Sumo, Sportsmatic

Specifications

Movement

Solar

Case Material

Stainless Steel

Case Width

46mm

Case Thickness

10.7mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

80m

Dial Color

Green

Jewels

29j

Frequency

36,000 bph

Power Reserve

42 hours

Year

1970

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