Seiko Cal. 6641 - 353

The Seiko 6641-353 represents an important milestone in Seiko's 1965 lineup. Powered by the 6641 caliber with 32j jewels beating at 21,600 bph, it delivers a 41 hours power reserve. [seikata-wm-b915c323ddef]

Also known as: Bullhead, World Timer

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

39mm

Case Thickness

14.2mm

Lug Width

19mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

70m

Dial Color

Black

Jewels

32j

Frequency

21,600 bph

Power Reserve

41 hours

Year

1965

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