Seiko Cal. 6641 - 406

The Seiko 6641-406 represents an important milestone in Seiko's 1991 lineup. Powered by the 6641 caliber with 33j jewels beating at 36,000 bph, it delivers a 55 hours power reserve. [seikata-wm-aac786c1cdc6]

Also known as: Sportsmatic

Specifications

Movement

Hand-Winding

Case Material

Gold-Plated

Case Width

41mm

Case Thickness

13.7mm

Lug Width

22mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

110m

Dial Color

Navy

Jewels

33j

Frequency

36,000 bph

Power Reserve

55 hours

Year

1991

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