Seiko Cal. 6641 - 964

The 6641-964 is a sought-after Quartz piece from Seiko's golden era. Powered by the 6641 caliber with 29j jewels beating at 36,000 bph, it delivers a 48 hours power reserve. [seikata-wm-97fb71517e27]

Also known as: Monster, Crown

Specifications

Movement

Quartz

Case Material

Two-Tone

Case Width

34mm

Case Thickness

14.1mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

140m

Dial Color

Black

Jewels

29j

Frequency

36,000 bph

Power Reserve

48 hours

Year

1968

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