Seiko Cal. 6657 - 412

The Seiko 6657-412 represents an important milestone in Seiko's 1973 lineup. Powered by the 6657 caliber with 34j jewels beating at 21,600 bph, it delivers a 46 hours power reserve. [seikata-wm-8748617a7ebf]

Also known as: Baby Tuna, Emperor

Specifications

Movement

Quartz

Case Material

PVD Black

Case Width

39mm

Case Thickness

12.9mm

Lug Width

19mm

Crystal

Acrylic

Bezel

Bidirectional

Water Resistance

190m

Dial Color

White

Jewels

34j

Frequency

21,600 bph

Power Reserve

46 hours

Year

1973

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