Seiko Cal. 5657 - 338

The Seiko 5657-338 represents an important milestone in Seiko's 1970 lineup. Powered by the 5657 caliber with 18j jewels beating at 21,600 bph, it delivers a 52 hours power reserve. [seikata-wm-e16faff4c82a]

Also known as: Sea Horse

Specifications

Movement

Automatic

Case Material

PVD Black

Case Width

39mm

Case Thickness

13.9mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

30m

Dial Color

Burgundy

Jewels

18j

Frequency

21,600 bph

Power Reserve

52 hours

Year

1970

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