Seiko Cal. 5657 - 838

This Hand-Winding model from 1987 features a 46mm PVD Black case. The Rotating bezel and 46mm case give it a distinctive presence on the wrist. [seikata-wm-1ac6059cfdb5]

Also known as: UFO

Specifications

Movement

Hand-Winding

Case Material

PVD Black

Case Width

46mm

Case Thickness

12.3mm

Lug Width

18mm

Crystal

Mineral

Bezel

Rotating

Water Resistance

190m

Dial Color

Cream

Jewels

22j

Frequency

21,600 bph

Power Reserve

51 hours

Year

1987

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