Seiko Cal. 6641 - 316

The Seiko 6641-316 represents an important milestone in Seiko's 1966 lineup. Powered by the 6641 caliber with 29j jewels beating at 21,600 bph, it delivers a 65 hours power reserve. [seikata-wm-2fc4a075bc8d]

Also known as: Samurai

Specifications

Movement

Hand-Winding

Case Material

Titanium

Case Width

36mm

Case Thickness

9.4mm

Lug Width

20mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

200m

Dial Color

Green

Jewels

29j

Frequency

21,600 bph

Power Reserve

65 hours

Year

1966

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