Seiko Cal. 6657 - 446

The Seiko 6657-446 represents an important milestone in Seiko's 1968 lineup. Powered by the 6657 caliber with 30j jewels beating at 21,600 bph, it delivers a 53 hours power reserve. [seikata-wm-c69deea9d7d3]

Also known as: Baby Tuna

Specifications

Movement

Kinetic

Case Material

PVD Black

Case Width

35mm

Case Thickness

10.9mm

Lug Width

21mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

150m

Dial Color

Cream

Jewels

30j

Frequency

21,600 bph

Power Reserve

53 hours

Year

1968

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