Seiko Cal. 6642 - 356

The Seiko 6642-356 represents an important milestone in Seiko's 1971 lineup. Powered by the 6642 caliber with 21j jewels beating at 28,800 bph, it delivers a 49 hours power reserve. [seikata-wm-1db490602a9e]

Also known as: Baby Tuna, Flighty

Specifications

Movement

Hand-Winding

Case Material

Stainless Steel

Case Width

44mm

Case Thickness

9.0mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

80m

Dial Color

Cream

Jewels

21j

Frequency

28,800 bph

Power Reserve

49 hours

Year

1971

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