Seiko Cal. 5657 - 357

This Automatic model from 1979 features a 41mm Stainless Steel case. Powered by the 5657 caliber with 21j jewels beating at 21,600 bph, it delivers a 60 hours power reserve. [seikata-wm-0bddd23b409c]

Also known as: Tuna

Specifications

Movement

Automatic

Case Material

Stainless Steel

Case Width

41mm

Case Thickness

9.2mm

Lug Width

21mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

190m

Dial Color

Silver

Jewels

21j

Frequency

21,600 bph

Power Reserve

60 hours

Year

1979

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