Seiko Cal. 5657 - 412

The Seiko 5657-412 represents an important milestone in Seiko's 1971 lineup. Powered by the 5657 caliber with 22j jewels beating at 21,600 bph, it delivers a 37 hours power reserve. [seikata-wm-ac38b7fb3b85]

Also known as: World Timer, Baby Tuna

Specifications

Movement

Solar

Case Material

Titanium

Case Width

35mm

Case Thickness

9.8mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

40m

Dial Color

Black

Jewels

22j

Frequency

21,600 bph

Power Reserve

37 hours

Year

1971

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