Seiko Cal. 5657 - 581

The 5657-581 is a sought-after Hand-Winding piece from Seiko's golden era. The Inner Rotating bezel and 44mm case give it a distinctive presence on the wrist. [seikata-wm-5012f1f33f61]

Specifications

Movement

Hand-Winding

Case Material

Hardlex-Coated Steel

Case Width

44mm

Case Thickness

15.0mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

40m

Dial Color

Black

Jewels

25j

Frequency

21,600 bph

Power Reserve

36 hours

Year

1976

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