Seiko Cal. 5657 - 841

This Spring Drive model from 1976 features a 41mm PVD Black case. Powered by the 5657 caliber with 31j jewels beating at 21,600 bph, it delivers a 55 hours power reserve. [seikata-wm-c60c3b668f93]

Also known as: Silverwave, Golden Tuna

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

41mm

Case Thickness

8.5mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

30m

Dial Color

Black

Jewels

31j

Frequency

21,600 bph

Power Reserve

55 hours

Year

1976

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