Seiko Cal. 5657 - 748

The Seiko 5657-748 represents an important milestone in Seiko's 1988 lineup. With its 22mm lug width and 13.8mm profile, it sits comfortably on most wrists. [seikata-wm-e92475b7d58f]

Also known as: Helmet

Specifications

Movement

Hand-Winding

Case Material

Hardlex-Coated Steel

Case Width

38mm

Case Thickness

13.8mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

110m

Dial Color

Green

Jewels

19j

Frequency

28,800 bph

Power Reserve

46 hours

Year

1988

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