Seiko Cal. 6641 - 413

The Seiko 6641-413 represents an important milestone in Seiko's 1966 lineup. Powered by the 6641 caliber with 19j jewels beating at 28,800 bph, it delivers a 42 hours power reserve. [seikata-wm-d72ee40bb929]

Also known as: Monster

Specifications

Movement

Hand-Winding

Case Material

Two-Tone

Case Width

46mm

Case Thickness

9.0mm

Lug Width

22mm

Crystal

Acrylic

Bezel

Bidirectional

Water Resistance

180m

Dial Color

Black

Jewels

19j

Frequency

28,800 bph

Power Reserve

42 hours

Year

1966

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