Seiko Cal. 6641 - 646

The Seiko 6641-646 represents an important milestone in Seiko's 1971 lineup. The Coin-Edge bezel and 42mm case give it a distinctive presence on the wrist. [seikata-wm-7e35b14227c8]

Also known as: Baby Tuna, Flighty

Specifications

Movement

Spring Drive

Case Material

Stainless Steel

Case Width

42mm

Case Thickness

13.5mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Coin-Edge

Water Resistance

170m

Dial Color

Navy

Jewels

28j

Frequency

21,600 bph

Power Reserve

61 hours

Year

1971

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