Seiko Cal. 5657 - 201

The Seiko 5657-201 represents an important milestone in Seiko's 1965 lineup. Powered by the 5657 caliber with 21j jewels beating at 21,600 bph, it delivers a 72 hours power reserve. [seikata-wm-5fcf74903ff1]

Also known as: Helmet, Flighty

Specifications

Movement

Solar

Case Material

Titanium

Case Width

41mm

Case Thickness

8.2mm

Lug Width

18mm

Crystal

Mineral

Bezel

Bidirectional

Water Resistance

100m

Dial Color

Champagne

Jewels

21j

Frequency

21,600 bph

Power Reserve

72 hours

Year

1965

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