Seiko Cal. 5657 - 426

This Solar model from 1971 features a 39mm Hardlex-Coated Steel case. With its 19mm lug width and 11.8mm profile, it sits comfortably on most wrists. [seikata-wm-f43ae6fe31dd]

Also known as: UFO, Baby Tuna

Specifications

Movement

Solar

Case Material

Hardlex-Coated Steel

Case Width

39mm

Case Thickness

11.8mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

100m

Dial Color

Silver

Jewels

23j

Frequency

36,000 bph

Power Reserve

36 hours

Year

1971

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